Bonding at service

[Shawn pavich]

Hi everyone this is my first post. I have used mike holts fourm many times but never posted,So here I go.we have a existing 200 amp surface mount MSP over head 2" IMC 4/0 AL,2" conduit goes threw top plate down wall goes into a LB then goes into MSP threw back with a chase nipple .the plans call for a 400 amp MSP over head BTW this is a residential and solar project 80 amp back feed PG&E said we can use existing over head 2"conduit and 4/0 for the new 400 MSP which I know to be wrong but if that's what they approve then who I'm I to disagree my ? Is from what I know that a chase nipple going into a conduit body is not a a proper bonding I'm thinking of putting a bonding wedge between the flat side of chase nipple and MSP thank for your back feed in advance

 

[Smart $]

Welcome :thumbsup:

Suggest using NEC compliant size for the service drop.

As for bonding the riser, I prefer a bonding locknut...

 

[ActionDave]

Welcome to the forum.

Adding a bonding wedge will bring you into compliance with 250.94 unless you want to go into the debate over whether or not a chase nipple is allowed to go into the LB at all.

How deep into this rabbit hole do you want to go?

 

[iwire]

Welcome to the forum.

Adding a bonding wedge will bring you into compliance with 250.94 unless you want to go into the debate over whether or not a chase nipple is allowed to go into the LB at all.

How deep into this rabbit hole do you want to go?

Pretty much the deal.

I would suggest getting rid of the chase nipple and installing a close nipple.

 

[iwire]

PG&E said we can use existing over head 2"conduit and 4/0 for the new 400 MSP which I know to be wrong but if that's what they approve then who I'm I to disagree my ?

Suggest using NEC compliant size for the service drop.

If it is on the NEC side of the service point I would not be following the power companies advice.

If it is on the utility side of the service point I would not begin to worry about it.

 

[Shawn pavich]

Thanks for the feed back there is a lot of things not code with this job
wire size conduit size
LB buried in wall
chase nipple
this house is occupied so if we get called on anything from Inspecter
are PG&E home owner might not have power in that case I would hook
it up myself then have to inconvience the home owner at a later date
(sorry we have to disconnect your power agian cause we did not do it
right the first time)
so the 400 MSP is only bottom feed can I use use a 3" Myers hub to
penetrate top of MSP ,eve of house is only about 2" of over hang then
guessing about 4" rain gutter so I would have to off set 3"ridged 6"
rent a bender 400 mcm we already bought MSP not a typical 400
with 2 200 amp breakers stright 400 amp main 320 continuous so no
CT so the only thing if I do it this way would be turning that bottom feed
MSP to a top feed .this is not a rule 16 so there is no spects from PG&E
Im just worried that the Inspecter would call us on using the existing
conduit and wire .I ask my boss more then a few times are you sure that
PG&E said we can use existing riser and wire he said yes

 

[ActionDave]

......I ask my boss more then a few times are you sure that
PG&E said we can use existing riser and wire he said yes

Then do what he says and if a problem comes up find out what he wants to do to solve it.