EGC question

[electricalperson]

ive gotten into an argument with a coworker about sizing the EGC. we have a pipe containing a single phase 208 volt 30 amp circuit and a 120 volt 20a circuit and he kept telling me you only needed a 12 guage EGC. article 250.122 (C) states that you need to size the EGC according to the size of the larger size OCPD conductors so iwanted him to run a #10. he kept saying its somewhere in the code but didnt remember where.

[jamesguy10]

i think he's nuts. you are right. the egc needs to be sized according to the other conductors

[infinity]

Look at 250.122(C).

[electricalperson]

Look at 250.122(C).

thats what i did and shown him but he thinks theres exceptions or whatever somewhere deep within the code

[infinity]

thats what i did and shown him but he thinks theres exceptions or whatever somewhere deep within the code


Oops, I see that you did post that Article, sorry.:roll: Tell him he's wrong, there is nothing "buried" deep in the code book.

[celtic]

thats what i did and shown him but he thinks theres exceptions or whatever somewhere deep within the code

What he "thinks" and what he "knows" seem to be like a set of railraod tracks....always together, but never meeting.

Ask him to prove what he thinks...then you will both know (that you are correct :wink: )