Bonding the Neutral for Multi-Service Disconnects

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megawire

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Gentlemen,

We have been debating this issue in our shop. Please furnish your opinion:

An existing service has (1) 400 amp rated discon main and a seperate 200 amp rated discon for PLP (Landlord) loads. Is it neccessary to bond the neutral on both s/w's or just the 400 amp s/w where the bond is created to the water main and secondary electrode?

Footmote: There are only two service s/w's, which are under the maximum of six (6) discons before requiring a main discon!

Also, if your answer is yes to both s/w's, then is it required to continue the same neutral sizing throughout both system s/w's (the 400amp rated conductor)?
 
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megawire

Member
Re: Bonding the Neutral for Multi-Service Disconnects

Originally posted by luke warmwater:
First, what is your opinion?
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I believe according to 250.28 all SE enclosures should be bonded to the neutral. My understanding is a little short on the reqs. for the neutral size with a multiple s/w service. I believe the largest size should be continued in other service s/w enclosures.
 
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