中国科学家研发“全天候”发电的太阳能电池
百度 即便郑智已经38岁，但他仍是恒大和国足阵中不可或缺的核心。
For questions dealing with grounding and bonding of electrical installations, and the specific requirements of such.
309 questions
3
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1
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Subpanel ground and neutral fix
I’m adding a subpanel in the (former) garage (attached). There was existing 6g SE H-H-N-G running there from the main panel. After install found one hot was at 111v and the other at 129v. 240v between ...
- 31
1
vote
0
answers
37
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USA - What is best practice for bonding Grounding Electrode Conductor (GEC) to ground rod? [closed]
Going to be installing proper grounding electrode system - two 8' copper-clad rods bonded with bronze acorn clamps to 6 gauge copper GEC to panel. Pre-existing GEC is just 8 gauge copper wire clamped ...
- 4,773
1
vote
1
answer
68
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Can this split-bus panel be converted to a subpanel?
My house has a split-bus panel from 1979 (Square D box model QOB 30X200-3; interior model QON 26-614HA), providing 200 amp service. The panel is completely full.
I want to install a separate main ...
- 2,947
1
vote
0
answers
31
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Outdoor Kitchen Metal Cabinetry Grounding Requirements
I've just built an outdoor kitchen using metalframing and then sheathed that in cementboard and then covered it with metal siding, so its a bunch of metal covering more metal inside. There are several ...
3
votes
2
answers
265
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Avoiding ground loop
I am setting up a workshop in my shed and want a source of electricity there. My initial plan was to have the shed isolated from the house and be completely solar powered with the help of power ...
- 171
1
vote
1
answer
53
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Add Ground Bus Bar to ITE EQ Load Center
I have an old ITE load center that I am adding a new 50A breaker to for an EV charger. I will be wiring a NEMA 14-50 receptacle, rather than hardwiring the EVSE, so I will have a neutral wire. As you ...
- 11
1
vote
2
answers
76
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When adding a grounding bar to a main panel, does the ground bond screw need to be removed?
If I tap some threaded mounting holes in the back of my 1970's GE service panel for a new ground bar, my understanding is that I can move all of my grounds from the Neutral/Ground bus bar to this new ...
- 133
0
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1
answer
260
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HVAC wiring in soffit [closed]
I opened up a soffit in my basement and found that the wires to the heat pump. I have four units. They are not in conduit and they have a staple around all four orange wires and they’re laying on a ...
1
vote
0
answers
109
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Rooftop TV antenna lightning strike mitigation
Common wisdom tells us that a grounded antenna is safer for the TV and other household equipment in the event of an electrical storm.
I've read that grounding a rooftop antenna can lessen the chances ...
- 173
1
vote
1
answer
93
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Old subpanel with EMT conduit used as ground. Can I attach a ground bar & connect the green ground wires from new circuits to the ground bar?
I have 50 year old subpanel with EMT conduit being used as ground. Added some new 12/2 circuits via FMC into this subpanel - can I attach a ground bar to subpanel and connect the green ground wires ...
- 113
0
votes
0
answers
86
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Adding a 60A 240V Pool shed subpanel
I live in Los Angeles, California. My pool shed recently burned down. It had two 20A 240 circuits for two 1.5 HP pool motors. One 20A 120 circuit for the spa blower and pump. One 20 A 120 circuit for ...
4
votes
2
answers
104
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Can I move the inlet ground and neutral to the main disconnect?
We have a new 200 amp service, with a new meter box and service disconnect on the exterior of the house. Directly behind the meter box is a new larger 40 spot sub-panel.
We want to install a generator ...
- 41
1
vote
1
answer
134
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Should I remove neutral to ground bond in a sub-panel without a ground wire?
I have overhead service to a meter and main panel with a 200 amp main breaker. I have 3 subpanels. One is in a garage that also houses the deep well pump located 6 feet from the main panel. Another is ...
- 79
5
votes
1
answer
270
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Sub Panel/EMT Grounding Questions
looking for some clarity on sub-panel/EMT grounding. Been doing some research but not fully clear on some things.
Going to feed a sub-panel/loadcenter from a 60A breaker installed in a 200A main panel ...
- 53
9
votes
1
answer
821
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Why am I not seeing continuity between MC cable sheathing and ground wires? [closed]
Using a multimeter, I checked the continuity of the aluminum sheathing against any of the conductor wires (black/white/green) and there is no continuity to any of them
And then, when I wired the 3 ...
- 103