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Joined: Jan 2003
Posts: 4,391
I
Moderator
Early, many portables do not have neutral bonded to the frame.

I have a 4 year old Coleman 5KW unit with a clear tag that says "Floating Neutral"

By the way another way around this problem is to use a transfer switch that switches the neutral. We use these all the time on jobs that have GFP protection.

Bob


Bob Badger
Construction & Maintenance Electrician
Massachusetts
Joined: Jan 2003
Posts: 4,391
I
Moderator
By the way if this unit is installed by the utility it would be under their control and not subject to the NEC.

I do not believe electric meters are listed at all and therefore are not 'service rated'.


Bob Badger
Construction & Maintenance Electrician
Massachusetts
Joined: Jan 2005
Posts: 4
B
Junior Member
Most portable generators state in the manual that you must remove the bonding jumper before connecting to building wiring.
I have also seen stand by gen-sets where the neutral & ground are bonded. I won't mention names but one comes with a transfer switch that does not switch the neutral.There is no mention of removing the jumper in the manual

Joined: Dec 2003
Posts: 751
E
Member
Switching the neutral only makes for a separately derived source, not a legally connected generator. You will still have a parallel path with the ground and neutral when the switch is turned to "generator".
Thanks for the info on portable generators. I will have to modify my stance, and make sure I get one without the neutral bonded.


Earl
Joined: Jan 2003
Posts: 4,391
I
Moderator
Quote
You will still have a parallel path with the ground and neutral when the switch is turned to "generator".

No you will not, that is the point of switching the neutral.

Bob


Bob Badger
Construction & Maintenance Electrician
Massachusetts
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