feeder between service and disconnect for mobile home

[elecmen]

In a mobile home park the service equipment is located 100' away from the mobile home. The required disconnect is installed within 30' of the mobile home. My question is there still an exception that allows you to not run an EGC between the service and the disconnect?(There will be a 4th wire run from disconnect to MH and ground rod driven and bonded to disconnect) If not if your just replacing the disconnect and the 3 wire feeder is already run do you have to run the 4th wire? Could you supply code referance for this please. Thanks

 

[hurk27]

In a mobile home park the service equipment is located 100' away from the mobile home. The required disconnect is installed within 30' of the mobile home. My question is there still an exception that allows you to not run an EGC between the service and the disconnect?(There will be a 4th wire run from disconnect to MH and ground rod driven and bonded to disconnect) If not if your just replacing the disconnect and the 3 wire feeder is already run do you have to run the 4th wire? Could you supply code referance for this please. Thanks

550.33(A)(2) of the 2008 still has it, and HUD rules CFR 24 3280.800 which goes off of the 2005 allows it, so as far as I know it is allowed.

550.33(A)(2) Exception: For an existing feeder that is installed between
the service equipment and a disconnecting means as covered
in 550.32(A), it shall be permitted to omit the equipment
grounding conductor where the grounded circuit conductor
is grounded at the disconnecting means in
accordance with 250.32(B) Exception.

 

[hurk27]

It was changed to only allow existing in 2008, but since this is HUD territory CFR 24 3280.800 will supersede the NEC and like I said above it goes off the 2005 which has the old wording that allows it even with new.

 

[hurk27]

Here is where the rule of CFR 24 the NEC

(b) In addition to the requirements of this part and Part II of Article 550 of the National Electrical Code (NFPA No. 70–2005), the applicable portions of other Articles of the National Electrical Code must be followed for electrical installations in manufactured homes. The use of arc-fault breakers under Articles 210.12(A) and (B), 440.65, and 550.25(A) and (B) of the National Electrical Code, NFPA No. 70–2005 is not required. However, if arc-fault breakers are provided, such use must be in accordance with the National Electrical Code, NFPA No. 70–2005. Wherever the requirements of this standard differ from the National Electrical Code, these standards apply.

But since the requirement (and exception) is not in the CFR the 2005 will be the code addressed, at least that is the way it is looked at here in Indiana?

Here is the link to CFR 24 3280.800 which is the latest HUD electrical codes

 

[elecmen]

Thanks Wayne. So if this were a new install based on the 2011 code a 3 wire feeder between the service and the disconnect would be acceptable?

 

[hurk27]

Thanks Wayne. So if this were a new install based on the 2011 code a 3 wire feeder between the service and the disconnect would be acceptable?

All I can say that here in Indiana it is recognized that HUD supersedes the NEC and the state since it is Federal, but you might just want to check with your local AHJ