delfadelfa
Member
- Location
- Cincinnati, OH
What was the first code year that we had to install an 8' ground rod for an electrical service?
The oldest NEC I have is 1978 and it is in there under 250-83.
So your question is : When did the NEC require a water pipe GEC to be augmented with an another GEC?(rod etc) Correct?
The oldest code that I have is the 1937 NEC
The oldest code that I have is the 1937 NEC and the 8' rod is listed in section 2578. The 25 ohm resistance is in section 2579 and if 25 ohms in not met two or more electrodes connected in parallel shall be used.
480 Sparky will be able to go back further.
The oldest NEC I have is 1978 and it is in there under 250-83.
Is the 1978 code cycle what I am looking for???
go back and read 250-81 and 250-84