eager2learn
Senior Member
- Location
- Mennifee,Ca
If you bond the ground to the XO terminal in a transformer - do you also have to bond the groung to nuetral in a switchgear installation
The x-frmr is located outside and it isnt a seperate service - i took the ground coming from the primary side and bonded it to the ground rod located in the x-frmr - i then took a bonding jumper to the XO - one of the journeyman told me they wanted to bond the neutral inside the switchgear to the ground bus - is this overkill and shouldnt the neutral and ground busses be seperate from one aonther in the gear ?
Maybe, maybe not. If not than than see 250.30(A)(1) expt#2If you bond at both locations you will be creating parallel paths for the current to flow through.
You can use a ground rod, only if the water pipe/structural metal grounding methods are not available. So your connection to a ground rod at the transformer may be a violation.
Could you explain this further? 250.54 tells me I can use auxiliary electrodes, also I believe a separate structure requires an electrode in this case. With an outdoor transformer, the pad would be considered a structure, that is if the pad is a separate structure.
I may be off base with the electrode requirement for separate structures, cant find an article that directly covers it.