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10
votes
1answer
2k views

During a lightning storm, what causes the lights to temporary cut off and on?

I know it is pretty common during a lightning storm for lights to temporary cut off and on, but where and how and why is this occurring? Is the transformer temporally shutting off power to prevent ...
10
votes
1answer
1k views

What are “termination points” and why do I need them on my electrical supply?

An inspection of my electric supply service on the outside of my home in Maryland said I need 3 termination points and two grounding rods. The grounding rods I can get but I have no clue about these ...
8
votes
3answers
279 views

How should I route my Romex and Network cables and can I safely drill another hole through this joist?

I am trying to run a bunch of network cables from my network switch in the basement into the attic so that I can disperse them throughout the second floor bedrooms. At the same time, I needed to ...
6
votes
5answers
1k views

Are power outlets in a home out of phase with each other?

I'm working on a science project and there's one aspect of home wiring I need to find out (don't worry, I'm not messing with wiring - this is all on paper). Since 120V outlets in a home can be wired ...
4
votes
2answers
2k views

Can I wire 3-way switches so that when they are both in the same orientation the light will be off?

I replaced my 3-way switches. Is it possible to have either switch shut the light off, by pulling down on the toggles Either switch does shut the light off, but then one toggle is up, and the other ...
3
votes
1answer
6k views

What is a bus bar in an electrical switch board?

I am doing some research in electrical wiring and mains switch boards and was wondering what a bus bar is and what it does?
3
votes
2answers
56 views

Are barrier terminal blocks or bus bars inside a junction or weather-proof box up to NEC code?

I'm going to be adding some Particle Photon relay control to some receptacles so I can remotely turn on and off appliances and lighting. I'm going to house the Photon board and relay in a ...
3
votes
1answer
90 views

Mystery Electrical Voltages in Duplex Junction Box

So I'm finally getting around to installing the ceiling to floor bookcase in my home office. There is a single duplex outlet that I intend to reverse from facing into the office, to facing outwards ...
3
votes
1answer
909 views

Unused electrical duplex box, soon to be hidden behind a bookcase?

I'm getting ready to install bookcases for my home office (SouthWest USA). One wall floor to ceiling consisting of four units screwed together. In one place there is a duplex outlet right behind the ...
3
votes
1answer
589 views

Does the circuit providing a light at the electrical panel have to be ONLY for that light?

Does the circuit providing a light at the electrical panel have to be ONLY for that light? I'm fairly sure there specifically has to be a light at the panel, as well as a circuit with an accessible ...
3
votes
3answers
103 views

How to run wire through steel garage floor system

We are building a carriage house, with a 4 car garage and a basement underneath. The basement has steel I-beams and the metal b-decking that the garage floor is poured on top of as a ceiling. What ...
3
votes
2answers
204 views

Troubleshooting dropped phase in 240 volt line

A 60 amp breaker in our circuit breaker box serves a sub-panel in our barn. That panel serves 5 120 volt lighting and convenience circuits. The sub-panel has two bus bars, each attached to one phase ...
3
votes
1answer
135 views

GFCI Kitchen Circuit(s)

I understand that all wall receptacles (including counters) must be GFCI protected in a kitchen with a combined dining area but how about a separate dining area/room receptacles (separated from ...
3
votes
1answer
43 views

Bank of wall outlets not working

I have a bank of wall outlets that are not working. I have checked the fuses and found all of them check ok at 120 v ac. I then replaced all three outlets with new ones and still have no power. I did ...
2
votes
1answer
188 views

Main breaker on load center won't open

I was in the process of connecting a Reliance generator trow over switch , although the job was completed , I was trying to shut off power to the entire house by opening the main breaker but would not ...
2
votes
3answers
210 views

Distributing load in electrical panel

I am in the process of rewiring my house. The house was built in 1950 and even though the service panel was upgraded in the early 70's to a Square D 200 amp service, the system is ungrounded and will ...
2
votes
1answer
317 views

Can I somehow wire my generator to my power pole?

I have a power pole that has a 200 amp breaker before it enters my house and a 30 amp (240) breaker for my well. Again, both are outside before the electricity enters my 200 amp house box. Is there a ...
2
votes
1answer
104 views

Can I use a switch to toggle the neutral bonding on a generator?

I am in the process of attaching a 2-Pole transfer switch to my breaker panel and powering it by a 7500W generator. The generator is neutral-bonded-to-ground. I understand I have to disconnect this in ...
2
votes
2answers
80 views

Can earthing of a building degrade over time

The building is almost 12 years old. We didn't have this problem before. But in this last 2-3 days some residents complained they have experienced shock coming form the pipeline of bathroom even after ...
2
votes
2answers
210 views

How can I power multiple raspberry pi around the house?

I am planning to power multiple Raspberry Pi's around the house. Some will be security cameras, one will be a media player connected to TV and another one will manage home network and maybe a website ...
2
votes
1answer
317 views

How many outlets for a small recording studio/media room?

I'm getting ready to close the deal on a house that has a 20' x 20' detached garage that I will be converting into a recording studio/media room. I'm going to be running two main power amplifiers (A ...
2
votes
2answers
2k views

Suitability of flexible metallic conduit serving as ground

EDIT: The attached photo is the most easily accessible example of the conduit used in the entire house. This shows the conduit attached to the garbage disposal with the previously mentioned 3/4 set ...
2
votes
1answer
388 views

Live wire running through entire apartment wall?

I'm currently renting an apartment and my spouse and I want to hang a metal fixture above the wall where our bed is (in lieu of a headboard...for now at least). Where I want to hang it is 4 feet above ...
2
votes
0answers
53 views

Increasing the size of a sub panel

I am considering solar and the easiest place to connect the system for grid-tie is into a subpanel. With the 2013 CEC, this is permitted. However, I have a slight problem. I don't have any free ...
1
vote
3answers
9k views

How many lighting circuits are needed in the LED era…? (US - NEC)

This is in a two story, ~1000square foot per floor building. With the advent of affordable, decent (IMHO) LED fixtures (finally!) the entire lighting load for the structure looks to be 500W - 1000W at ...
1
vote
3answers
463 views

How many amps does it take to power 2 AC's, a freezer, a refrigerator, 2 TV's, and a computer?

I'm making my garage into a living place and I put in a 50 amp line from my house to the garage. The garage has its own fuse box but I want to have an upstairs living area and a downstairs man-cave. I ...
1
vote
3answers
67 views

How do I choose which breaker breaks first?

Let say I wanted some power out in my shed. I ran just 14 gauge wire thinking I won't blow the 15A breaker with just lights and the occasional smaller power tools. For the most case this is true... ...
1
vote
1answer
21 views

The subpanels ground is not bonded to main panels neutral busbar

The main panel has a neutral and three ungrounded conductors entering it from the utility provider is also has a grounding rod the neutral and three conductors get transmitted from one location to the ...
1
vote
1answer
43 views

One half of my mobile home electrical won't work

I was switching out a couple of switches when I bumped two of the wires, they sparked and popped. Now on one whole side of the mobile home the outlets and switches won't work. I checked the breakers ...
1
vote
1answer
115 views

Splitting a light circuit into two

I currently have a simple circuit. Three ceiling lights, and one switch. I would like to break it into two lights on that switch and the other light on another switch. Will I have to run all the ...
1
vote
2answers
127 views

How do I determine if I have an open neutral?

I live in VA. My bath and bedroom lights were working fine and suddenly it was as though I threw the circuit breaker. Everything on the bedroom/bathroom circuit breaker went dead. I checked the ...
1
vote
1answer
210 views

Can I feed a panel 200' away from a double pole 30 ampere breaker using 10 AWG copper conductors?

I need 14 amps at my boat house to run a boat lift on 120v. The boat house is approximately 200' from main panel. I can run conduit and #8 wire and make it work with no problem, but I will need to buy ...
1
vote
1answer
296 views

ground wire sizing

what is the required ground size relative to the associated hot and neutral? For example: if I am connecting a sub-panel with two #4 hot leads and one #4 common lead, what size wire is required to ...
1
vote
1answer
108 views

How many “layers” of surge protection is considered useful?

I want to make my whole house surge protected, there are several solutions available You can install MOV based surge protection on the entire house in line entry point - first line of defense You ...
1
vote
1answer
973 views

What size breaker and wire do I need to feed a panel for a tankless water heater?

I purchased a electric tankless water heater and I would like to know the following? The unit requires 3 separate 40 amp breakers, one for each line. I have 200 amp service. The subpanel will be ...
1
vote
2answers
227 views

Can I merge two ceiling light fixtures into one with two wall switches?

I have two ceiling light fixtures on two separate wall switches that I would like to merge into one light fixture controlled by the two separate wall switches. Do I just make one of the wall ...
1
vote
1answer
370 views

GE Load Center Q's

I have an old GE meter socket load center (see picture). I have no idea what the model number is because the paper label on the inside of the lid is unreadable, and I have been unable to find any ...
1
vote
0answers
67 views

Subpanel - still getting power with breaker disconnected

I'm in the middle of a garage/apt project and ran into an issue yesterday. Here's my layout. I have a 200Amp service meter with two 100 amp breakers just after the meter....one breaker feeding the ...
1
vote
2answers
122 views

Can I add a 30 amp breaker to a sub panel being fed from a 50 amp breaker

I have 100 amp service panel that feeds a sub panel with a 50 amp breaker. In the sub panel, there are currently five 15 amp breakers that feed three rooms worth of lights and two outdoor outlets used ...
1
vote
0answers
56 views

Is this main box outdated and needs upgrade?

This house is 1970's built (UK) but not sure when the electrical wiring were done. The main box looks like in the attached picture. It seems it has only fuse boxes in it... and does not have any MCB, ...
1
vote
0answers
47 views

Circuit Location Detection

We recently got a nearly double electrical bill during the previous cycle. I, wrongly, assumed it was just a fluke and my family had left some things on longer than they were supposed to. This ...
1
vote
0answers
145 views

Unsure about wiring in electrical box

My circuit box door says that Dryer and outside outlets are connected on breaker 13 and 14, uppon opening the box and retracing wires I found that Dryer wires are just dangling inside the box not ...
1
vote
0answers
183 views

What should I do about multiple feeds on the same light switch?

I have a bank of 6 light switches all single pole that have 3 separate feeds going to them. 2 of the 3 feeds are tied together and are connected to 3 of the switches, requiring that I shut off 2 ...
0
votes
4answers
918 views

Should a neutral wire ever be connected to the neutral for the power meter?

I was not working with this circuit breaker box but I was interested to see what was going on with only 3 breakers for the entire apartment. I found a neutral from the apartment going into the ...
0
votes
2answers
2k views

How can I connect a 120V compressor to a 3 phase WYE 208 electrical system?

I have 4 cables from a power supply which are 3 phase WYE 208 volt. so if I measure between neutral and hot I get 120V. The problem is that I need to hook up a compressor for 110V single phase (just ...
0
votes
1answer
78 views

Fuses blow and sparks appear when using my home's wiring circuits

I have recently had issues with different electrical appliances / light bulb / bathroom wiring packing up. If you put 4 bulbs in different areas of the house, you can guarantee that 1 or 2 will blow ...
0
votes
2answers
91 views

Slow electrical circuits

I have a three way light circuit in my hallway that is connected to three ceiling lights. When I switch it on the third light will hesitate before lighting up. Why? Also, I have a different issue with ...
0
votes
2answers
196 views

Parents cable box caught fire, hour later half the house is out of power?

So, My dad was working on a leaking sink in a bathroom and my mom yells there is a fire. Their cable box caught fire, they put the fire out without a problem and mom called the cable company. While ...
0
votes
1answer
123 views

Can I wire a box with two 120-volt duplex outlets each wired to one leg of a 240-volt 3-wire plug?

In my shop I have plenty of NEMA 6-20Rs (240-volt, 20-amp receptacles) and not enough NEMA 5-20Rs (120-volt 20-amp receptacles). These are all right next to the panel. My goal or my desire: I want ...
0
votes
1answer
32 views

adding electrical GFCI plug

can a GFCI outlet be added to the end of a circuit? if so do you need a 3 core wire? we have tried to install with 2 core wire but it dosent seem to work