Temp Service

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wirenut25

Member
Im working on a temporary service and in need of some help. The disconnect has only one ground lug which is coming from my ground rods. Where does my ground to the panel come from? Any input would be appreciated.
 

augie47

Moderator
Staff member
Location
Tennessee
Occupation
State Electrical Inspector (Retired)
do you have a fusible disconnect ahead of your panel ?
Does it have a neutral bar ?
Is this "ground lug" part of that bar or seperate ?
 

wirenut25

Member
Yes this is a fusible disconnect. You are right the ground lug is connected with the 2 neutral lugs. I hope Im correct in stating that this is where the MBJ is located. I am just unsure of what lug the ground to the panel comes from. Sorry if this is confusing and thanks again for your help.
 

augie47

Moderator
Staff member
Location
Tennessee
Occupation
State Electrical Inspector (Retired)
what wiring method do you have from your disconnect to the panel ?
(conduit ?)
You are correct that the lug on the neutral bar should be used to connect the grounding electrode conductor.
If you need an equipment ground (depending on the answer above), as they are telling you, clean the can and bolt a lug to it.
Do you have a bond betwen your neutral and can in your fusible disconnect ?
 

don_resqcapt19

Moderator
Staff member
Location
Illinois
Occupation
retired electrician
Is the disconnect listed as "suitable for use as service equipment"? If so it will have provisions for the main bonding jumper and the required number of connections. If it is not so rated you can't use it for a service equipment and it will not have the main bonding jumper provision.
 

Rewire

Senior Member
Im working on a temporary service and in need of some help. The disconnect has only one ground lug which is coming from my ground rods. Where does my ground to the panel come from? Any input would be appreciated.

You are bonding at the disconnect so the grounding and grounded conductors from the disconnect to the panel both originate at the grounded buss but will land on seperate busses at the panel be sure and bond the grounding buss to the panel
 

bradleyelectric

Senior Member
Location
forest hill, md
There are disconnects made that are rated for service disconnect that have bonding jumper and grounded conductor provisions but don't have provisions for grounding conductors other that cleaning a spot on the can and drilling for a lug.
 

electricmanscott

Senior Member
Location
Boston, MA
Is the disconnect listed as "suitable for use as service equipment"? If so it will have provisions for the main bonding jumper and the required number of connections. If it is not so rated you can't use it for a service equipment and it will not have the main bonding jumper provision.

You'd think that but the last few meter/mains that I used did not have enough terminals.
 
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