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Re: Can I Run Power 24 Feet Using Liquid Tight Flexible Conduit??

Originally Posted by bigb

Yep I put some emt on a buddy's house on the beach in Mexico and in a few years it was already dissolving. I learned right away to use PVC there from now on. The local Mexican electricians mount indoor disconnects right on the pole in the street, 30 amp standard and 50 amps for the rich Americans. A two space indoor box with no cover, just a deadfront, the breaker is just out there in the weather. They last about 4 years. When my buddy's went bad we gutted it and spliced in new wires to a 3R box I brought and mounted it facing inside the yard then sealed up the old box. They don't really care what you do down there, the meter rings don't even have a seal.
These are brand new services from 2012, the first year electricity became available to the village. To replace the equipment on some you have to chisel them out of the stucco. Notice no breaker handle ties either.
But none of this is important compared to the fishing and the Margaritas.

We see that stuff in do it yourself mobile home installations. Green Mountain Power is the enforcement entity on single family. They hold electricians to the letter of VT Service Standards, but low income homeowners live by utterly different rules. I get the "I don't understand why it failed!" calls, 90% in January. Most commonly after dark.

Last December, I got one at 9:00 PM. It was a tenant calling about a rented trailer. I asked who I bill it to, he got agitated. I asked who his landlord is? "I don't know, some old guy!"
"Then you will be paying?"
"I don't give a fu(k if anybody pays!"
"Well I do."
He then engaged in a long tirade of what a pri(k I am.
I pointed out he doesn't have to do business with me, plenty of electricians I'm sure dying for the chance to work free.
He hung up.

Re: Can I Run Power 24 Feet Using Liquid Tight Flexible Conduit??

Originally Posted by Willie B

We are in the rust belt. State road managers won't admit they do it to force us to buy new vehicles. Now, every night September to May, they slime the roads with brine, roughly comparable to driving in sea water.
We don't get salt in the flex conduit, but any raceway ought to be blocked to stop moist air from migrating. Stop cold humid air movement, stop condensation.

Yep I put some emt on a buddy's house on the beach in Mexico and in a few years it was already dissolving. I learned right away to use PVC there from now on. The local Mexican electricians mount indoor disconnects right on the pole in the street, 30 amp standard and 50 amps for the rich Americans. A two space indoor box with no cover, just a deadfront, the breaker is just out there in the weather. They last about 4 years. When my buddy's went bad we gutted it and spliced in new wires to a 3R box I brought and mounted it facing inside the yard then sealed up the old box. They don't really care what you do down there, the meter rings don't even have a seal.
These are brand new services from 2012, the first year electricity became available to the village. To replace the equipment on some you have to chisel them out of the stucco. Notice no breaker handle ties either.
But none of this is important compared to the fishing and the Margaritas.

Re: Can I Run Power 24 Feet Using Liquid Tight Flexible Conduit??

Duct seal baby.

Re: Can I Run Power 24 Feet Using Liquid Tight Flexible Conduit??

Aint that what the gray putty that seems to migrate around the tool box is for?

Re: Can I Run Power 24 Feet Using Liquid Tight Flexible Conduit??

We are in the rust belt. State road managers won't admit they do it to force us to buy new vehicles. Now, every night September to May, they slime the roads with brine, roughly comparable to driving in sea water.
We don't get salt in the flex conduit, but any raceway ought to be blocked to stop moist air from migrating. Stop cold humid air movement, stop condensation.

Re: Can I Run Power 24 Feet Using Liquid Tight Flexible Conduit??

Originally Posted by Willie B

We've had trouble with metallic liquidtight. If vibration is present, the insulation wears out against the steel. We switch out metallic to non metallic.

I live on Long Island but even in the five boroughs because of the water on their shores, liquid tight with metal fills with water and starts making chemicals that eat right through the THWN or THWN-2 coating. It does the same thing in the non metallic liquid tight as well. It is condensation that causes it. Even in rigid pipe outdoors condensation builds up and eats through the THWN-2 coating, so we replace it XLP, XHHN-2 wire. That stuff is pretty tough never replaced that. In places like sewage treatment plants that is all you can use.

Sometimes you find they pour cement and encase the liquid tight partially in the cement. The problem is that it stays cold in the cement and warm air condensates in that area filling the liquid tight with water. The wire just disintegrates.

Sincerely,

William McCormick

Re: Can I Run Power 24 Feet Using Liquid Tight Flexible Conduit??

Originally Posted by Willie B

We've had trouble with metallic liquidtight. If vibration is present, the insulation wears out against the steel. We switch out metallic to non metallic.

Yup same here. No one installs the metallic anymore it crushes easily now too. It is not galvanized well either.

Sincerely,

William McCormick

Re: Can I Run Power 24 Feet Using Liquid Tight Flexible Conduit??

Originally Posted by danielplace

Sealtite is technically limited in use by this code, They can say it is subject to damage just like anywhere they would require schedule 80 PVC. Thankfully they do allow us to hook up a/c condensers with the stuff. We used to be required to use sealtite for the high voltage and only use Carflex for the low voltage. Now Carflex is allowed for the high and the low voltage. Originally when I started in the trade up to like 30 years ago they would allow 18/2 t stat wire to be run free taped to the refrigerant lines or the sealtite.
Even without the Metal in it teh Carflex is more durable than ealtite is actually. If sealtite gets pulled or step on the corrogated metal inside gets damaged or undone and can actaully cut into the conductors inside. This is why you would want it where subject to damage. To a inspector that can be anywhere outdoors less than 48" above grade. The Carflex though still has the same subject to damage restriction on it too so no more legal in these locations but we sure enough use both for pumps and condensers and such outdoors subject to damage all over every day and pass inspections.

Article 350 Liquidtight Flexible Metal Conduit Type LFMC

350.12

Uses Not Permitted

It cannot be installed when subject to damage or where temperatures exceed that which is approved for the material.

We've had trouble with metallic liquidtight. If vibration is present, the insulation wears out against the steel. We switch out metallic to non metallic.

Re: Can I Run Power 24 Feet Using Liquid Tight Flexible Conduit??

Originally Posted by danielplace

Sealtite is technically limited in use by this code, They can say it is subject to damage just like anywhere they would require schedule 80 PVC. Thankfully they do allow us to hook up a/c condensers with the stuff. We used to be required to use sealtite for the high voltage and only use Carflex for the low voltage. Now Carflex is allowed for the high and the low voltage. Originally when I started in the trade up to like 30 years ago they would allow 18/2 t stat wire to be run free taped to the refrigerant lines or the sealtite.
Even without the Metal in it teh Carflex is more durable than ealtite is actually. If sealtite gets pulled or step on the corrogated metal inside gets damaged or undone and can actaully cut into the conductors inside. This is why you would want it where subject to damage. To a inspector that can be anywhere outdoors less than 48" above grade. The Carflex though still has the same subject to damage restriction on it too so no more legal in these locations but we sure enough use both for pumps and condensers and such outdoors subject to damage all over every day and pass inspections.

Article 350 Liquidtight Flexible Metal Conduit Type LFMC

350.12

Uses Not Permitted

It cannot be installed when subject to damage or where temperatures exceed that which is approved for the material.

The THWN or THWN-2 is not even water proof. The proof is how many I have pulled out of rigid pipe installed outside because they were shorting out to ground. Rather new THWN-2 wire sitting in water is not a good plan. It was condensation that was causing the water in the rigid pipe most of the time.

When we wire in wet locations we use XLP or XHHW-2 that seems to hold up well soaking in water. In theory that wire and insulation is what should be on the conductors in wet locations. When I put in a service for friends or family that is what I use. The black colored insulation is UV proof too. That is the same wire that connects the compressor to the contactor in a condenser.

I find rotted wire in whips rather often, the clear comes off and the inner jacket starts to deteriorate.

I am not trying to cause anyone grief I am just sharing some of mine.

Sincerely,

William McCormick

Re: Can I Run Power 24 Feet Using Liquid Tight Flexible Conduit??

Sealtite is technically limited in use by this code, They can say it is subject to damage just like anywhere they would require schedule 80 PVC. Thankfully they do allow us to hook up a/c condensers with the stuff. We used to be required to use sealtite for the high voltage and only use Carflex for the low voltage. Now Carflex is allowed for the high and the low voltage. Originally when I started in the trade up to like 30 years ago they would allow 18/2 t stat wire to be run free taped to the refrigerant lines or the sealtite.
Even without the Metal in it teh Carflex is more durable than ealtite is actually. If sealtite gets pulled or step on the corrogated metal inside gets damaged or undone and can actaully cut into the conductors inside. This is why you would want it where subject to damage. To a inspector that can be anywhere outdoors less than 48" above grade. The Carflex though still has the same subject to damage restriction on it too so no more legal in these locations but we sure enough use both for pumps and condensers and such outdoors subject to damage all over every day and pass inspections.

Article 350 Liquidtight Flexible Metal Conduit Type LFMC

350.12

Uses Not Permitted

It cannot be installed when subject to damage or where temperatures exceed that which is approved for the material.

Re: Can I Run Power 24 Feet Using Liquid Tight Flexible Conduit??

Originally Posted by danielplace

Ah I see we couldn't see the power coming in on the othe side and the wire in the sealtite is the factory interconnect cable.

I do not get the relevance of the picture to the MC being in sealtite we were discussing.

You should never be running MC for anything outdoors in wet location so the manufacturer saying it should be continuous is of little meaning as most of the condensers would be in a wet location.

Short flexible connection in Sealtite and Carflex belong outside and Greenfield or MC inside are normal wiring methods to me.

I sure hope they wouldn't allow over 50 feet sealtite run in a building. It doesn't belong there at all even if legal technically. You use it outside in short length for flexible connections. You use greenfield for short length flexible connections and EMT for the rest indoors.

I recon it is just a different world where you working and the methods used and preferred.

Sealtite, (non metallic liquid tight), LFNC is expensive. It is sticky, hard to pull conductors through. Never seen it used except where flexibility, or a compound bend is needed. No reason you can't use rigid non metallic conduit to run the length of the run, finish with Sealtite. Sealtite is normally used from the machine disconnect to the machine. Lengths of up to 3' need no supports other than terminator connectors.

I'd have to research the actual language in code & local inspectors may vary in their interpretation of code. Inspectors where I live are OK with removing the outer jacket of NM-B cable where the conductors run through LFNC. One said "It's the same conductor as THWN". In the hair splitting of code, it ain't THWN if it doesn't say THWN on it, but some inspectors allow it.

Re: Can I Run Power 24 Feet Using Liquid Tight Flexible Conduit??

Originally Posted by William McCormick

We have the supply power covered, but the power and control wiring between the outdoor and indoor unit is the problem, it is high voltage 240 volts. The wire cannot be spliced or you lose the warranty on the equipment which is pricey. That is the wire that causes problems. STOW or STJOW both are temporary wires. And in commercial they are not allowed to be run in the open outside. So it is just a Cluster barrage.

Sincerely,

William McCormick

I hear you man. Trying to please everyone when the rules of play aren't in anyone's favor. There does need to be some exceptions/clarifications made for these things so the installers don't go crazy. Some AHJ's have actual taken some steps with amendments and acceptable ways they will accept the installs.

The manufacturers are often attempting to make it a DIY kit so easy anyone can do it but seem to completely throw the NEC codes out the window.

Re: Can I Run Power 24 Feet Using Liquid Tight Flexible Conduit??

Originally Posted by danielplace

Residential use wiring for indoor like NM, EMT or PVC if commercial the MC, EMT or PVC to a PVC or Bell box or disconnect on the wall then change to THHN/THWN in Carflex or sealtite to get the flexible connection to the unit.

I have never expected to be able to take same wire from inside to be able to go all the way to the unit with it by sleeving it. I will admit I have taken romex down the line cover the ran PVC out of side of the line cover to the disconnect and gotten inspections many times like that.
If it were new construction, then I would run a piece of EMT with a 90 at the top and a 90 through the wall into the back of the disconnect with romex for residential and THHN/THWN pulled in for commercial. If existing then PVC from above down to the disconnect. Inspectors have never turned that down either even though you got romex going outside they must know it is dry and safe.

HAPPY 4th of JULY !!!!!!

We have the supply power covered, but the power and control wiring between the outdoor and indoor unit is the problem, it is high voltage 240 volts. The wire cannot be spliced or you lose the warranty on the equipment which is pricey. That is the wire that causes problems. STOW or STJOW both are temporary wires. And in commercial they are not allowed to be run in the open outside. So it is just a Cluster barrage.

Sincerely,

William McCormick

Re: Can I Run Power 24 Feet Using Liquid Tight Flexible Conduit??

Originally Posted by bigb

All outdoor conduit, including sealtight, is a wet location per NEC, therefore must contain only wet location rated conductors. If I was working where William is and if it is true what he is saying I would be challenging those inspectors and I would end up changing things or getting run out of town, or maybe becoming an inspector myself. Challenged a few here and won, was very diplomatic about it and only once ended up with hard feelings but that jerk ended up getting fired by the city anyway.

It is a rough one. Some of the indoor units no longer have a place to land MC cable so they really cannot be used in commercial facilities.

They sell the STOW cable or STJOW cable for interconnecting the indoor and outdoor units but, that is temporary cable as well, so it is all just a joke at this point. I think the inspectors had to give up or people would not be able to install them. I was always for a good safe job, and I think the manufacturers rather than really put some effort into coming up with great products to install their AC systems started creating problems for just about any type of wire.

Like I said I am for PVC coated MC cable, which was not available around here for a long time. It stops the RF for control purposes when run together with other control wires.

Sincerely,

William McCormick

Re: Can I Run Power 24 Feet Using Liquid Tight Flexible Conduit??

Originally Posted by William McCormick

So my question is what are you going to use for wire from the indoor units to the outdoor units for power and control wire?

My choice is PVC coated MC cable. As nothing else meets code alone.

Sincerely,

William McCormick

Residential use wiring for indoor like NM, EMT or PVC if commercial the MC, EMT or PVC to a PVC or Bell box or disconnect on the wall then change to THHN/THWN in Carflex or sealtite to get the flexible connection to the unit.

I have never expected to be able to take same wire from inside to be able to go all the way to the unit with it by sleeving it. I will admit I have taken romex down the line cover the ran PVC out of side of the line cover to the disconnect and gotten inspections many times like that.
If it were new construction, then I would run a piece of EMT with a 90 at the top and a 90 through the wall into the back of the disconnect with romex for residential and THHN/THWN pulled in for commercial. If existing then PVC from above down to the disconnect. Inspectors have never turned that down either even though you got romex going outside they must know it is dry and safe.

HAPPY 4th of JULY !!!!!!

Re: Can I Run Power 24 Feet Using Liquid Tight Flexible Conduit??

All outdoor conduit, including sealtight, is a wet location per NEC, therefore must contain only wet location rated conductors. If I was working where William is and if it is true what he is saying I would be challenging those inspectors and I would end up changing things or getting run out of town, or maybe becoming an inspector myself. Challenged a few here and won, was very diplomatic about it and only once ended up with hard feelings but that jerk ended up getting fired by the city anyway.

Re: Can I Run Power 24 Feet Using Liquid Tight Flexible Conduit??

Originally Posted by danielplace

These minisplit installations still must meet the code to be installed and get a proper inspection that is meeting the NEC code. The code doesn't go out the window because some manufacturer is clueless to the NEC and proper wiring methods. There is a code that says manufactured instructions need to be followed but most AHJ do not accept those instructions as a way to trump the NEC requirements while another may allow certain things to be done that is not otherwise normal based on the code versus the manufacture's instructions.

Other than where the AHJ has made a written amendment to allow some particular process to be allowed that would be normally because of the conflict you have to have a NEC legal installation.

Romex(NM) doesn't go outside. Not even sleeved in sealtite or Carflex. It is not right or good practice as it is illegal. Even if it came like that as a interconnect cable. You would have to change it to meet code.

SJO as is not permitted to be run concealed by walls, floors, or ceilings or located above suspended or dropped ceilings. Nec 400 on flexible cords. Flexible cords are not used as a wiring method. As such they are in their own code section.

https://www.ecmweb.com/national-elec...d-fixture-wire

When we install mini splits in South Florida almost none of that factory supplied garbage gets used and they are wired in traditional NEC legal wiring methods just the same as any other system would be wired. It all goes in the scrap bin, and you do it right and correctly.

So my question is what are you going to use for wire from the indoor units to the outdoor units for power and control wire?

My choice is PVC coated MC cable. As nothing else meets code alone.

Sincerely,

William McCormick

Re: Can I Run Power 24 Feet Using Liquid Tight Flexible Conduit??

AC has always been a problem for electricians. If you have multiple AC systems fed by one panel box, there is the chance that all of them may come on at once. So on jobs like that I install time delay on relays all with different delays. Otherwise even a 400 amp box will see a 270 amp draw as three five ton units start after a power outage, or every time the thermostat calls multiple units.

Sincerely,

William McCormick

Re: Can I Run Power 24 Feet Using Liquid Tight Flexible Conduit??

This is the disconnect for the unit. I did not install that.

Attachment 1741229

Sincerely,

William McCormick

Re: Can I Run Power 24 Feet Using Liquid Tight Flexible Conduit??

On commercial buildings where the mini split units were cut off the roof to put on a new commercial roof that is many inches higher than the old roof, I have used underground splice kits in a small plastic outdoor box with liquid tight in and out, and the units performed as expected. They really are afraid of sparks from a bad connection.


Sincerely,

William McCormick

Re: Can I Run Power 24 Feet Using Liquid Tight Flexible Conduit??

Originally Posted by danielplace

These minisplit installations still must meet the code to be installed and get a inspection. The code doesn't go out the window because some manufacturer is clueless to the NEC and proper wiring methods.

Romex(NM) doesn't go outside. Not even sleeved in sealtite or Carflex. It is not right or good practice as it is illegal. Even if it came like that as a interconnect cable. You would have to change it to meet code.

SJO as is not permitted to be run concealed by walls, floors, or ceilings or located above suspended or dropped ceilings. Nec 400 on flexible cords.

You do not have to tell me about the code violations. All I see is code violations. There is a four wire NM cable that is “designed” for mini splits it is stranded three conductor with a ground and if you go to any supply house and ask for mini split control wire they will bring you out a 250’ roll of it. It is wrong though and does not meet code where it leaves the building. It has THWN-2 wire in it so when you put it in liquid tight it is ok. If you put SJO cord in liquid tight it is OK as well as the cable is rated for outdoor and wet locations.

Here is a Mitsubishi Hyper Heat, with a branch box that makes it easier to get through the wall, there is just one power cable to the branch box and one control cable to the branch box, both are rated as high voltage. From the branch box you can just run regular MC cable to the indoor units. But the two MC cables that go through the wall from the branch box to the outdoor unit have to be covered in liquid tight to be make code. Once in the electrical enclosure of the unit, I just have to bond the MC cable to the grounded unit casing.

If you splice control wire Mitsubishi will not honor the warranty.

There is a supply power disconnect on the left side of the unit.

Attachment 1741227

With these units you have to weigh in the refrigerant from a scale based on how long the runs are to the branch box and or the indoor units. All the mini splits are like that now. There is no more high pressure port.

Attachment 1741228

Sincerely,

William McCormick

Re: Can I Run Power 24 Feet Using Liquid Tight Flexible Conduit??

Originally Posted by William McCormick

The control wiring in commercial buildings because it is 240 volt power, must be MC cable. The problem is that when you go to leave the building you have to cover it in liquid tight. We cannot run NM cable in commercial buildings. And Mitsubishi states that the conductor must not be spliced between the indoor and outdoor unit or it voids the warranty. And since the units and accessories can cost ten grand I am not going to do that.

Even in residential we cannot run the NM control cable from the building to the unit without putting it in liquid tight. Which is right and good practice. It is just a PITA. PVC coated MC cable fixes it all.

In commercial it is pipe outside to the disconnect, or EMC inside to the disconnect, but usually MC cable to the disconnect. And then liquid tight from the disconnect to the unit, with single conductor THWN-2.

Sincerely,

William McCormick

Originally Posted by William McCormick

About the relevance I was explaining both commercial and residential problems without using PVC coated MC cable and I was just showing all involved what some of these beasts look like. Those units are often wired with SJO cord supplied by the manufacturer that sits outside 24/7. To me that is wrong. Even the NM control wire that is used is really not supposed to be exposed.

Sincerely,

William McCormick

These minisplit installations still must meet the code to be installed and get a proper inspection that is meeting the NEC code. The code doesn't go out the window because some manufacturer is clueless to the NEC and proper wiring methods. There is a code that says manufactured instructions need to be followed but most AHJ do not accept those instructions as a way to trump the NEC requirements while another may allow certain things to be done that is not otherwise normal based on the code versus the manufacture's instructions.

Other than where the AHJ has made a written amendment to allow some particular process to be allowed that would be normally because of the conflict you have to have a NEC legal installation.

Romex(NM) doesn't go outside. Not even sleeved in sealtite or Carflex. It is not right or good practice as it is illegal. Even if it came like that as a interconnect cable. You would have to change it to meet code.

SJO as is not permitted to be run concealed by walls, floors, or ceilings or located above suspended or dropped ceilings. Nec 400 on flexible cords. Flexible cords are not used as a wiring method. As such they are in their own code section.

https://www.ecmweb.com/national-elec...d-fixture-wire

When we install mini splits in South Florida almost none of that factory supplied garbage gets used and they are wired in traditional NEC legal wiring methods just the same as any other system would be wired. It all goes in the scrap bin, and you do it right and correctly.

Re: Can I Run Power 24 Feet Using Liquid Tight Flexible Conduit??

Originally Posted by danielplace

Ah I see we couldn't see the power coming in on the othe side and the wire in the sealtite is the factory interconnect cable.

I do not get the relevance of the picture to the MC being in sealtite we were discussing.

You should never be running MC for anything outdoors in wet location so the manufacturer saying it should be continuous is of little meaning as most of the condensers would be in a wet location.

Short flexible connection in Sealtite and Carflex belong outside and Greenfield or MC inside are normal wiring methods to me.

I sure hope they wouldn't allow over 50 feet sealtite run in a building. It doesn't belong there at all even if legal technically. You use it outside in short length for flexible connections. You use greenfield for short length flexible connections and EMT for the rest indoors.

I recon it is just a different world where you working and the methods used and preferred.

About the relevance I was explaining both commercial and residential problems without using PVC coated MC cable and I was just showing all involved what some of these beasts look like. Those units are often wired with SJO cord supplied by the manufacturer that sits outside 24/7. To me that is wrong. Even the NM control wire that is used is really not supposed to be exposed.

Sincerely,

William McCormick

Re: Can I Run Power 24 Feet Using Liquid Tight Flexible Conduit??

Originally Posted by danielplace

Ah I see we couldn't see the power coming in on the othe side and the wire in the sealtite is the factory interconnect cable.

I do not get the relevance of the picture to the MC being in sealtite we were discussing.

You should never be running MC for anything outdoors in wet location so the manufacturer saying it should be continuous is of little meaning as most of the condensers would be in a wet location.

Short flexible connection in Sealtite and Carflex belong outside and Greenfield or MC inside are normal wiring methods to me.

I sure hope they wouldn't allow over 50 feet sealtite run in a building. It doesn't belong there at all even if legal technically. You use it outside in short length for flexible connections. You use greenfield for short length flexible connections and EMT for the rest indoors.

I recon it is just a different world where you working and the methods used and preferred.

The control wiring in commercial buildings because it is 240 volt power, must be MC cable. The problem is that when you go to leave the building you have to cover it in liquid tight. We cannot run NM cable in commercial buildings. And Mitsubishi states that the conductor must not be spliced between the indoor and outdoor unit or it voids the warranty. And since the units and accessories can cost ten grand I am not going to do that.

Even in residential we cannot run the NM control cable from the building to the unit without putting it in liquid tight. Which is right and good practice. It is just a PITA. PVC coated MC cable fixes it all.

In commercial it is pipe outside to the disconnect, or EMC inside to the disconnect, but usually MC cable to the disconnect. And then liquid tight from the disconnect to the unit, with single conductor THWN-2.

Sincerely,

William McCormick

Re: Can I Run Power 24 Feet Using Liquid Tight Flexible Conduit??

Originally Posted by William McCormick

When you run MC cable for mini splits Mitsubishi the manufacturer says the wire must not be spliced it must be one conductor with no splices. So you cannot switch from THWN in seal tight to MC cable to run through the commercial building. I am not stating anything strange here. You just do not want to see the problem. You really only can use PVC coated MC cable in commercial buildings without jumping through hoops. And inspectors will not let you run 50 or more feet of liquid tight with THWN through the building like they would MC cable.

In residential they will not let you run THWN single conductors through liquid tight from the outdoor unit to the indoor units, but they will let you run a cable in liquid tight. But I prefer PVC coated MC cable, if I can get it. Lately I cannot get much of anything.

You are mixing supply power and indoor unit control wiring. The supply power comes from a disconnect on the left side of the unit, and single conductors in liquid tight attach to the unit. The other liquid tight contains the power and controls for the indoor units. I will be honest I am jumping around between commercial and residential as well, but only because I am being asked about both. In that picture there is no MC cable at all. There is none right now around here. There is a cable in the liquid tight for the indoor units.

Sincerely,

William McCormick

Ah I see we couldn't see the power coming in on the othe side and the wire in the sealtite is the factory interconnect cable.

I do not get the relevance of the picture to the MC being in sealtite we were discussing.

You should never be running MC for anything outdoors in wet location so the manufacturer saying it should be continuous is of little meaning as most of the condensers would be in a wet location.

Short flexible connection in Sealtite and Carflex belong outside and Greenfield or MC inside are normal wiring methods to me.

I sure hope they wouldn't allow over 50 feet sealtite run in a building. It doesn't belong there at all even if legal technically. You use it outside in short length for flexible connections. You use greenfield for short length flexible connections and EMT for the rest indoors.

I recon it is just a different world where you working and the methods used and preferred.