carflex usage

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elecmen

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NH
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Electrician
Does anyone see a problem with using carflex under a mobile home for the feeder conductors if it is secured to the frame of the home? It will be longer than 6' run closely to and secured at the proper intervals to the frame.
 
If it's strapped, you shouldn't have any problems.

For trailers I usually just run PVC across PT sleepers laying right on the dirt.:cool:
 
What about this?

550.10(I) Mast Weatherhead or Raceway. Where the calculated load exceeds 50 amperes or where a permanent feeder is used, the supply shall be by means of either of the following:
(1) One mast weatherhead installation, installed in accordance with Article 230, containing four continuous, insulated, color-coded feeder conductors, one of which shall be an equipment grounding conductor
(2) A metal raceway or rigid nonmetallic conduit from the disconnecting means in the mobile home to the underside of the mobile home, with provisions for the attachment to a suitable junction box or fitting to the raceway on the underside of the mobile home [with or without conductors as in 550.10(I)(1)]. The manufacturer shall provide written installation instructions stating the proper feeder conductor sizes for the raceway and the size of the junction box to be used.
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That's a good one Dennis. I'm confused now?

EDIT: It appears they're talking about the stub from the panel down to the crawlspace. Not the raceway ran THROUGH the crawlspace.
 
Cow said:
If it's strapped, you shouldn't have any problems.

For trailers I usually just run PVC across PT sleepers laying right on the dirt.:cool:
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No can do , it must be ridgid metal attached to the frame , if it follows the frame closely pvc can be allowed . Thats not just for a main feeder , it is any circuits added below the frame .
 
glene77is said:
Cow,
What is a "PT sleeper" ?
:)
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Pressure treated chunk of 2x4;)

jetlag said:
No can do , it must be ridgid metal attached to the frame , if it follows the frame closely pvc can be allowed . Thats not just for a main feeder , it is any circuits added below the frame .
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I guess we don't see it that way.

Every trailer home I've done has had a skirt around it. That takes 550.15(H) right out of the equation since it's no longer exposed to weather.
 
Cow said:
Pressure treated chunk of 2x4;)



I guess we don't see it that way.

Every trailer home I've done has had a skirt around it. That takes 550.15(H) right out of the equation since it's no longer exposed to weather.
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Around here they enforce 550.15 (h) underpined or not , its not underpinned when you move it down the highway .The code doesnt make an exception for underpin . The thin vinyl skirt sits on top of the dirt for all the drainage water to run right under . Also when the trailer gets moved to the next location , (which is quite often) conduit is subject to weather and damage and 550.15 (h) applies . Its pretty obvious no one wants conduit hanging down and falling on the highway , I can just see a 20 ft piece with the "chunks of wood " bouncing on the highway behind the trailer .:grin:
 
I lay the schedule 40 on the ground under the trailer, stake it down and attach it to the stub from the loadcenter with an expansion fitting. The feeder does not go with the mobile home when it is moved. Different than adding a branch circuit to the home. Never thought about carflex but don't see much difference.
 
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ptonsparky said:
I lay the schedule 40 on the ground under the trailer, stake it down and attach it to the stub from the loadcenter with an expansion fitting. The feeder does not go with the mobile home when it is moved. Different than adding a branch circuit to the home. Never thought about carflex but don't see much difference.
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That's pretty much what I do??

Wanting to run rigid under a trailer house seems a little extreme to me? Heck, some of the trailers I've crawled under had the DB wire(no conduit) laying on the ground or barely scratched in the dirt.
 
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