ozark01
What type of connector is typically used on a multi-conductor generator cable where it enters a 22kw generator if conduit is not used? Is there a connector that makes the connection water tight?
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grsthegreat
It HAS to be in some kind of conduit as it enters generator. If you use the 10 conductor trey cable, you can direct bury it 24” below surface, but you need to transition to a sched 80 conduit below ground then you can use a flexible Carlon style conduit and sealtight connector at the generator. I find the 1-1/4” works great.
if you ran it inside house and or thru house framing, we usually terminate it in a 8x8x4 3R rated junction box then use carflex flexible conduit to whip it into generator
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ozark01
I was going to run the cable down the side of the house for about 10' exposed from the transfer switch and then go to the generator. That is why I am curious about a fitting. I could run it in conduit but since the cable will be secured tightly to the house and not subject to damage I was just going to run the cable exposed.
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grsthegreat
Nope...not allowed. That cable is rated direct bury, or within framing where its protected from mechanical damage, but not to be left out in the open. You will have to place cable within sched 80 conduit until it gets to generator. I use flex conduit where it transitions into generator to allow vibration dampening as opposed to solid conduit run into generator. I have seen people run solid conduit into generator, and it appears to be just fine. Im not sure what your codes require. My inspectors want flex conduit within 2 feet of unit. Use 1-1/4” schedule 80 electrical conduit.
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Brian Baughman
The cable is also sunlight resistant and in some jurisdictions is permitted to be run exposed on the exterior of a dwelling unit.  It all depends on the local interpretation of "subject to physical damage".  Since the cable is a listed Type TC-ER-JP cable, technically you need a listed Type TC cable connector that is rated for wet locations.
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ozark01
Thanks for the heads up but I do have a question. 336.12 (2) sends me to 336.10(4) that says the cable can be run outside of conduit if it is supported by a messenger wire. 336.12 (3) says it can be run exposed if the cable is marked as sunlight resistant as this cable is. Securing to the house should satisfy the supporting issue so what is your take on what I just said about sunlight exposure? I appreciate your response and I will most likely run the 10' in conduit just to be safe.
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grsthegreat
Its the subject to physical damage that gets us nailed here.
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Cobranut
I'd put it in conduit.  A weed-eater could easily damage an exposed cable.
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ozark01
Cobranut wrote:
I'd put it in conduit.  A weed-eater could easily damage an exposed cable.


The cable will be about three feet off the ground but I agree with you.
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Geoff Z
Inspectors in our area wouldn't accept it surface-mount outside. Subject to damage give them a lot of latitude, and their answer is the only answer. Our guys use 1-1/4" non metallic sealtight. Measure it and cut to length. They lay it across the ground. Push/pull the Generac wire in. Strap and secure it with the wire already in.  
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Brian Baughman
ozark01 wrote:
Thanks for the heads up but I do have a question. 336.12 (2) sends me to 336.10(4) that says the cable can be run outside of conduit if it is supported by a messenger wire. 336.12 (3) says it can be run exposed if the cable is marked as sunlight resistant as this cable is. Securing to the house should satisfy the supporting issue so what is your take on what I just said about sunlight exposure? I appreciate your response and I will most likely run the 10' in conduit just to be safe.



The last sentence in 336.10(9) sends the code user to Article 340 where the cable is installed as exterior wiring.  Article 340 sends us to Article 334, and 334.15(A) permits the cable to be installed exposed where the cable closely follows the building finish.  So, if your local AHJ does not consider the cable to be exposed to physical damage, the cable is permitted to be installed exposed on the exterior of a building as long as the cable follows the building finish.  In my state, Wisconsin, all non-metallic cables that are exposed located from the floor or grade to a height of 6'6" are considered exposed to physical damage and must be protected by an approved means.
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ozark01
I'm going to run it in flex if for no other reason I can not find a readily available WP connector for TC cable. This was mentioned above by Brian Baughman.
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