Hot answers tagged

35

A single-pole, double-throw switch would do the job. A common 3-way switch is exactly that. You'd simply connect power to the common screw, and run power out from each of the traveler screws. All the neutrals tie together. Here's a nice animation showing the idea. More on switch terminology


24

Use a single pole double throw switch, called three-way in the U.S. (as isherwood suggests). Wire it like this and the circuit will do what you say you want. Of course with this, there is no way to ever switch everything off, so the circuit will consume power as long as the building stands. We strongly advise you not to do this. Instead, (again, as ...


16

Loose connections can produce heat and cause this problem. The fix is to disconnect and reconnect properly. Spring-loaded "stab connections" are particularly likely to suffer this problem; screw terminals (or shove-in terminals that are clamped by tightening a screw) are more reliable. If in doubt, outlets are cheap and you might want to simply replace this ...


16

Circuit wire is kept relatively large because general purpose receptacles are just that: general purpose. You can plug a nightlight into them one moment and a kilowatt hairdryer the next. In a fixture, luminaire, or appliance, on the other hand, the designers can use thinner wire (down to 18AWG for fixture wire as per NEC 402.6) as they know how much ...


10

How about something like this product (Thanks to A I Breveleri for pointing me in the right direction): http://www.leviton.com/OA_HTML/ProductDetail.jsp?partnumber=5685-2E&section=47084&minisite=10251 15 Amp, 120/277 Volt, Decora Plus Rocker Double-Throw Ctr-OFF Maintained Contact Single-Pole AC Quiet Switch, Commercial Spec Grade, Self Grounding, ...


9

Most AC units say specifically NOT to use extension cords. The reason for overheating is voltage drop caused by the possible smaller gauge of wire and length of the extension cord. An appliance rated at 12amps probably has a 14 or 12 gauge cord. If your extension is a smaller gauge, it may be too small for the current and heating up like an old fashion ...


6

Yes, as a short-term solution, terminating the wire in a listed box is a good idea. As a general statement, using something with a higher amp rating than necessary is fine. If you could temporarily cut the power to the circuit, it would be even better, but I can imagine that other things are running...


5

Large appliances like that need extremely burly extension cords which, not surprisingly, cost a lot more money than normal extension cords. Their ends are "fragile" in the sense that it's easy for them to take damage which results in them heating up, at which point the cord needs to be replaced. But even these cords are not intended (nor legal) for ...


5

The wiring in the wall (12/14awg) is sized to handle the entire capacity of that circuit up to 20/15 amp. The circuit will regularly include multiple lights or outlets within it. The circuitry within the light you mentioned only needs to handle the capacity that that device will use. If you open a device with a larger power draw (blender?) you will notice ...


4

If you use a 100A breaker your main in the mobile home you will need #3 copper wire to feed the sub the sub panel. A 60 Amp breaker in the main panel should provide enough power from the loads listed this would require #6 copper wire. You will need to run both hots a ground and neutral. In the sub the ground and neutral buses need to be isolated. Many ...


3

Breakers protect wires and receptacles. The wiring from the main panel to the subpanel must be protected by a breaker. It must be in the main panel, otherwise it can't protect the wire run! In other words: if the main-sub run is 10 AWG, it must be protected by a 30A breaker in the main panel. The "main" breaker in the sub-panel is redundant/...


3

For a subpanel application -- what you can do is pull the main breaker out of the panel and use a set of main lugs instead, as the panel disconnect is provided by the upstream feeder breaker (which will be a 30A unit given that your feeder is a 30A feeder). In particular, since the 100A MCB BR panels use a backfed type BR main breaker, you can simply pull ...


3

NEMA 14-20 are intended for two phase power. Of the four conductors, two are energized, one is neutral, and one is ground. (NEMA 14-20 diagram) A NEMA L15 is specifically intended for 3 phase power including a ground (but no neutral). The number after the hyphen is the current rating. That is, NEMA L15-60 is for 60 ampere conductors. (NEMA L15-20 ...


3

I think you are saying that the heat is being generated at the wall outlet where the male end of the extension cord is plugged in. If this is so, the heat is generated by high resistance at some of the metal-to-metal contacts inside the outlet device, which is caused by the contact areas being too small. Problematic metal-to-metal contacts would be at ...


3

In the UK you would need to pay a professional to remove, or make safe, the gas pipework for the hob. You would also need to pay an electrician to do the work if you need a new circuit for the new electric hob. Whether you need a new circuit depends on the diameter of the wires in the existing circuit and some prescribed "diversity" calculations about the ...


3

Yes, that's probably fine. Assuming the tabs connecting the two screw terminals on each side of your outlet are intact, the outlet is being used both as a receptacle and to join those wires. Simply connect the wires (including grounds) directly using wire nuts and remove the outlet, then install a blank face plate. Make sure the location remains accessible, ...


2

Heavy Duty Indoor 9' Extension Cord (14 gauge) (source)


2

To find if you have daisy-chained connections; easy: Count the sockets/outlets. If you have 4 sockets, see if you have 4 cables ending up at the entry point of the phone service. On ebay you can get a network tester for under $4 (I think ebay shows it to me in danish currency) "LAN Network/Phone Cable Tester RJ11 RJ12 RJ45 Cat5" It will only show if you ...


2

The manufacturer of the receptacle should make this detail clear in their documentation. It might even be printed on the case of the receptacle, though perhaps in very abbreviated / "hieroglyphic" form. That said... My understanding is that aluminum wiring must be used ONLY with approved mechanical connectors specifically designed for aluminum, and of ...


2

Why can't you install a proper receptacle near the opener? If you don't want to fish cable through the wall/ceiling, you could use conduit run along the surface of the wall/ceiling. Installing a replacement cord on the opener likely voids the warranty, and UL listing of the opener. Using a cord in this manner is also a code violation (according to ...


2

I'm not sure this is within the scope of DIY but DSL issues are almost always a result of interference on the line. A site like dslreports.com would probably be a good place to start. Either way, I'll type out a long winded answer because I spent a few years doing DSL troubleshooting for earthlink a while ago and this is an issue near and dear to my heart. ...


2

Even if the conduit is flooded, the wires should be completely insulated from any water. I would use a voltmeter to see what is happening electrically with the wires. If the neutral or ground wires are not at zero volts, then try to determine where the bridge from a "hot" wire is. Hopefully it is in a junction box in the garage or house. You can probably ...


2

You are treating a "spa panel" as something special when it really isn't. Considering this is indoors, you can get away with a standard indoor breaker enclosure (NEMA 1) instead of the weatherproof (NEMA 3R) "spa panel" box. In addition, the spa panel looks to be designed solely for surface (not flush) mounting -- flush mounting may cause issues with the ...


1

The sheathing on one of the ground wires appears to be melted. A faulty appliance plugged into the outlet could have overheated the outlet if the circuit breakers (or fuses) weren't working properly. The corroded look on the wires could also have been caused by high temperatures.


1

Provided the mount and cables allow the monitor to be readily removed to gain access to the box, this should not be a Code issue -- the basic requirement is that all junction boxes be readily accessible (i.e. you shouldn't have to tear apart the building to find 'em).


1

You cannot connect there. Those wires are connected to the black and red wires of the feed from the breakers. This is probably a MWBC and these two wires have 240v across them! You need to connect to the white wire from the breaker panel, as well as either the black or red. This only goes into the junction box and then out to the furnace. Suggest that you ...


1

There is no place in the code book that I can recall that requires 12" centers for a bearing wall. You can move over the studs to a 16" center, rather than making a header. If you choose to. The drywall will make it a little tough to do that...


1

Since you are dealing with 208Y/120V three phase power, the L14-20 isn't quite right -- its presence signifies two phases/neutral/ground, and you don't have a neutral here. The L15-20 is 3phases/ground without a neutral, so it can be used in your application; a L21-20 + adapter can be used instead if something that needs the neutral might be plugged in here ...


1

You will need a ohmmeter. Disconnect the IR Controller (the white box with white wires). If you check the the voltage drop (in the connector of the white wire) between the Positive (+) and the different wires. If you find that they all respond to commands from the remote... except for the port for the blue wire (which controls the blue light), then the ...


1

My experiance is in the UK but I doubt this differs much. First off how hot is hot? a bit warm is generally ok, too hot to touch is generally a bad sign. Evidence of charring/burning is definately bad. What tends to happen is you get a poor contact, maybe due to corrosion from age, maybe due to weak springs, maybe due to crap design in the first place. The ...



Only top voted, non community-wiki answers of a minimum length are eligible