I recently changed a service from 100 amps to 200 amps. The inside panel had a ground wire going to the water pipe. This panel is not located with the mains outside. Can I leave this ground wire hooked up or do I disconnect it? I have the grounding electrode outside connectected to the Main panel outside. Thanks... Steve
For myself I will leave it and that panel become a subpanel so as long you have grouding bar in there and keep the netrual and ground seprated and the exsting EGC is there you can use it.
{ unless your local code say something diffrent then follow thier regualtions }
Merci,Marc
Pas de problme,il marche n'est-ce pas?"(No problem, it works doesn't it?)
I recently changed a service from 100 amps to 200 amps. The inside panel had a ground wire going to the water pipe. This panel is not located with the mains outside. Can I leave this ground wire hooked up or do I disconnect it? I have the grounding electrode outside connectected to the Main panel outside. Thanks... Steve
I think the problem might be that if it was previously 100A, then that bond to the water piping is probably only a #6 or #8 Cu. With a 200A, it now should be at least #4, according to Table 250.66. I would remove the old wire and run a new #4 Cu from the piping to the main panel outside. IMO, that's where it really belongs anyway.
Kjay is Right your grounding electroid wire at the outside 100 is probally 6 or 8. You need a #4 for 200 amps . (250.66) This MUST be run to the Service disconnecting means outside Not subpanel. (250.24C). Also read (250.50)250.52) Yoopersup
If the water main is primary, then a supplemental GE is needed. My understanding is He has his ground (thru rods) met.Now the water need only be bonded.
250.50 ALL grounding electrodes as described in 250.52(a)1 though (a)6 that are PRESENT. shall be bonded TOGETHER to form grounding electrod system. See 250.52 Water Underground Water pipeing. Your only bonding the water line when less then 10ft of metal pipe is outside the building. Again read code sections I refered to in my ist post. Yoopersup If its part of the Grounding Electrod system it must go to the Service disconnect or disconnect switches.
250.50 ALL grounding electrodes as described in 250.52(a)1 though (a)6 that are PRESENT. shall be bonded TOGETHER to form grounding electrod system. See 250.52 Water Underground Water pipeing. Your only bonding the water line when less then 10ft of metal pipe is outside the building. Again read code sections I refered to in my ist post. Yoopersup If its part of the Grounding Electrod system it must go to the Service disconnect or disconnect switches.
Got Me Guy!!! "..That are present...." Up size it and bring that conductor back to the main.
Thanx for grabbing my attention to that.I got tunnel vision.
