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EGC installation requirement remote Sub-panel (NOT separate Building)
Sorry if this question has been asked numerous times, but i cant find a thread dealing specifically with conduit installations. All installations I am... -
Interpretation of "AHEAD" for table 250.122
Hello,
I have a question regarding table 250.122. The table says(please see attached screenshot) "Rating or Setting of Automatic Overcurrent... -
Do you always need an Equipment ground in conduit with conductors?
I can't seem to find any reference to this and it just may be common knowledge.
The Enphase IQ6 doesn't have any ground as it's electrically... -
NEC 250.122 Sizing PE and Equipment Grounding Conductor
Hi,
I am lost here in the pool of definitions. Now this may come across as a silly question however please help me clarify my mind as I have... -
PV Array grounding and lightning protection
Fellow PV Professionals,
According to 690.43(A), all exposed metal pars must be connected to an EGC. So on a PV array, all the metal parts... -
EGC with High Resistance Ground
2500kVA 480Y/277V industrial transformer with high-resistance ground (HRG) (neutral grounding resistor NGR) that limits ground fault current to 10A. For... -
Multiple raceways, does each need an EGC?
Hello, if you have one combiner box feeding multiple inverters, each with a separate raceway, does each raceway need an EGC or only one? Is there a code... -
EGC as GEC (for xfrmr in MCC)
Good Morning Everyone,
EGC as GEC seems to be a hot topic that has been discussed in great depth already on this forum; unfortunately, I... -
Upsizing Equipment Ground for Voltage Drop
I am looking at upsizing my AC conductors coming out of my inverter from a #6 to a #4. 250.122(B) says I need to increase the EGC size proportionally... -
installer cut off the #4 ground on the SER
Hi everybody...
I replaced two 2-2-2-4 SER with 2/0-2/0-2/0-4 & 1/0-1/0-1/0-4 to get 125A in each unit for a two-family. The upstairs... -
Considering the note on NEC table 250.122 for EGC sizing
There is an interesting note attached to table 250.122 that says:...
Note: Where necessary to comply with 250.4(A)(5) or (B)(4), the equipment grounding -
Attached Garage Main Disco, house sub = main. EGC?
Current situation: 2008 NEC. Attached garage. 100-amp Main Disconnect in garage. @60' sub-feed cable to 20-space panel in main section of house, finished...Last edited by mikewillnot; 06-19-15, 07:57 AM. -
EMT as EGC for large feeders
What do people think of using EMT as the only EGC on large feeders for 480V systems? It's permitted by code, but when are people comfortable that it... -
Equipment Bonding Jumper verses Equipment Grounding Conductor
The way I understand it the EGC is the basic effective ground fault current path and the EBJ is in addition to the EGC.
Two questions I had were:... -
EGC required in each conduit from a PV Array?
For a PV Array where multiple source circuits feed into a Transition Box, and then from there multiple conduits feed these source circuits directly to...