transformer grounding

[GSXR600]

Is it illegal to tap a grounding electrode to an existing transformer grounding electrode?

 

[augie47]

not sure I understand, but you can connect as many grounding electrode conductors as you desire to a grounding electrode.
Can you provide some specifics to your question ?

 

[GSXR600]

The plans are calling for me to connect to the Ex. XFRM grounding in exisitng electric room.


I thouht you could only tap onto an existing transformer electrode if the wire size was 3/0

 

[augie47]

terminology game
A common transformer grounding electrode CONDUCTOR (your post omitted the "conductor") must be a minimum of 3/0 per 250.30(A)(4).
If the grounding electrode itself is exposed (ground rod, building steel, etc) , you can, obviously, add an additional connection to that.

 

[brian john]

The plans are calling for me to connect to the Ex. XFRM grounding in exisitng electric room.


I thouht you could only tap onto an existing transformer electrode if the wire size was 3/0

It would really simplify things if you avoid abbreviations like EX. (I assume existing?) Common abbreviations lie XMFR most do understand.

 

[infinity]

The plans are calling for me to connect to the Ex. XFRM grounding in exisitng electric room.


I thouht you could only tap onto an existing transformer electrode if the wire size was 3/0

Yup, #3/0 is the minimum size that you can use for more than one transformer.