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Mobile home grounding #86331
10/08/03 05:39 PM
10/08/03 05:39 PM
P
pauluk  Offline OP
Member
Joined: Aug 2001
Posts: 7,520
Norfolk, England
I'm looking at the current requirements for the service connection to a mobile home.

Per the 2002 NEC, 550.16, and part (A)(1) specifically, clearly requires that neutral and ground must be kept separate on the mobile home and prohibits the grounding of appliance frames to the neutral. 550.10(B) specifies a 4-wire supply cord.

550.16(C)(1) requires that the chassis be bonded to the grounding bus in the panel.

Question:
I was browsing another site and read an item which suggests that in the past it was allowable for a mobile home to be fed via a 3-wire connection with N-Gnd bond at the panel.

Is this true?

How about the requirement of 550.16(C)(1) to bond the chassis -- Has this always been the case?

P.S. I'm ignoring the exception which allows N-Gnd bonds if the service equipment is attached to a "manufactured home" in accordance with 550.32(B), and just assuming that the service is located on a nearby post.


[This message has been edited by pauluk (edited 10-08-2003).]

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Re: Mobile home grounding #86332
10/08/03 08:02 PM
10/08/03 08:02 PM
B
Bjarney  Offline
Moderator
Joined: Apr 2002
Posts: 2,527
West-Southern Inner-Northeast ...
I don't think the N-Gnd bond at the panel has been allowed at keast since the early 1970s.

Re: Mobile home grounding #86333
10/11/03 05:02 PM
10/11/03 05:02 PM
P
pauluk  Offline OP
Member
Joined: Aug 2001
Posts: 7,520
Norfolk, England
So 30+ years of 4-wire supplies? Thanks.

Grounding and bonding issues seem to be an area where ideology changes over the years, both in the U.S.A. and the U.K.


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