Questions tagged [120-240v]

For question dealing with 120/240V single split phase electrical circuits.

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37 views

I have a Champion 120V generator, I want to use it to plug into a preinstalled/wired 240volt split phase outlet

I have a new champion generator, 120volt at 20 to 30amp. The previous home owner had the same unit but 240 volt. The home has a professionally installed system for power backup but has a 4 pin 240 ...
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1answer
77 views

Can I run conduit containing 120V wires inside larger conduit for 240V wires?

I was wondering if I could run 120v wires inside in a larger conduit that has higher voltage wires 240v, in a smaller piece of conduit? The reason I ask is that I have a manufactured home and when ...
1
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0answers
35 views

30V on 120 circuit - swapped dishwashers and circuit dropped to 30V

Situation: replaced dishwasher. Turned off the breaker first. The original DW is 100% fine, just doing an upgrade. I did not measure the voltage on the wires. New one - connect to existing wires, ...
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3answers
1k views

How much 120 from 240 is too much?

I'm running a double circuit breaker from the house at 40amps with 8ga for both hots, the neutral and the ground out to my shed, which is roughly 20 feet. I've got a sub box in the shed where I want ...
2
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1answer
106 views

Is it possible to wire a 240v outlet so that after I don't need 240v anymore I will have two 120v circuits?

I'm in the US. I will be installing a 240v outdoor outlet for an EVSE (electric car charger). However, in a few years I will have a garage built (elsewhere) and will move the EVSE to the garage, so ...
2
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3answers
439 views

Can I use four-wire cable from the panel to create a two-circuit duplex outlet?

I am planning on adding a server to one of the closets in my house. In order to do that I need to run electrical to the location of the server. For severs they recommend having 2 independent lines of ...
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1answer
31 views

RV Pedestal - 20 AMP GFCI & 50 AMP 14-50 in same 2 Gang Box?

I'm installing an RV pedestal at my home. Out-of-the-box pedestals are not available. I'm using a 70 AMP outdoor main lug load center (HOM24L880RBCP), and a quad 2-20A 1P, 1-50A 1P breaker to feed two ...
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2answers
50 views

Is this how I add GFCI and Regular Outlet to existing Multi Wire Branch Circuit, 20amp? 12/3 to 12/2 wiring with GFCI

I have a multi wire branch circuit using two 20amp breakers and a single run of 12/3 wire to a single split outlet in our laundry room. The top outlet (black) powers the gas dryer, the bottom outlet ...
8
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1answer
311 views

Proper way to modernize 1940's cabin sub-panels

This cabin is located in the United States, and was built in the 1940's. However, it has obviously had various electrical panels added to it after its original construction. I'm starting this new ...
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2answers
126 views

Dryer 240 to 120 question

I have a 240 volt dryer currently, and I want to change it out for a gas dryer that will utilize 120 volt. Since the circuit is 240 volt 30 amp, I'd like to use the existing 6-8 gauge wire and ...
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2answers
434 views

Running 240v circuit to detached garage

I am trying to determine the best way possible to get a 240v outlet to my detached garage approximately 25' from the breaker panel inside the house. I currently have 2 separate feeds to the garage ...
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1answer
310 views

Very unsafe-looking receptacle

While I was searching for duplex receptacles where one was NEMA 5 (120V) and the other was NEMA 6 (240V), I found a few normal ones that were what I was looking for (Leviton 5031, 5842, 5844, Hubbell ...
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3answers
2k views

How wasteful is a voltage transformer?

If an appliance that is rated for 220V is used with a 110v-to-220v transformer in a 110v country, or an appliance that is rated for 110V is used with a 220v-to-110v transformer in a 220v country, how ...
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5answers
2k views

Should I run 240v for any supported appliances?

I am having my main circuit breaker panel replaced (by a licensed electrician) and he told me I can run new circuits for him to hook up to the new panel. Is there any benefit to running 240v circuits ...
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1answer
99 views

Powering a 120v Receptacle off of a 240v Circuit Breaker dedicated to an Appliance

I have a 240 volt 20 amp GFCI circuit breaker powering an outdoor appliance that has 2 electric motors and a motor control unit to synchronize them. I would like to wire a receptacle off of 1 hot leg ...
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1answer
180 views

Adding 240v (NEMA 14-50) outlet right behind breaker panel

The breaker panel is on the outside wall, right next to my garage. I want to install a 240v outlet right behind the panel, thru the wall. If i open the panel, there are those round metal covers that ...
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2answers
319 views

Connecting 120/240 receptacles on the same circuit breaker

I want to add a branch circuit to the control panel using 12/3 wire and protected by 20 amp double pole circuit breaker. Is it safe to connect multiple duplex receptacles 120 volts and 240 volts on ...
7
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2answers
1k views

Electrical service sizing mix up in Mexico

Facts: The national electrical supply company of Mexico called "Comisión Federal de Electricidad" (CFE) oficially instructs users to install: A two pole one trip main interrupt behind the ...
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2answers
446 views

Future proofing for 240V outlet

I currently have a 12A EVSE that takes either 120V or 240V and uses a normal three-prong (NEMA 5-15) plug. I am looking to install a 240V outlet on a 50A circuit breaker to use with this EVSE, but I'm ...
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2answers
114 views

Replace 240 receptacle with one or two 120

I found some similar questions but given possibly different base assumptions I would like just to check that what I want to do is possible with existing wiring. In NYC, where everything is armored ...
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1answer
36 views

220v, gfci and amps

i am a home brewer and have recently purchased a 200v 30amp brewing pot (NEMA 6-30p). I have a 220v 50amp rv receptacle (NEMA 14-50r) with a 50A GFCI double-pole breaker in the main house panel. I ...
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1answer
64 views

Can I draw 240v out of this configuration?

This is how my subpanel looks like. I am looking to install a breaker for an AC unit. 20A. The only caveat is that this has to be 240V. This is a subpanel coming from the main one. There is a breaker ...
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1answer
270 views

Two Poles Three Black Wires and One White - Convert to 120 V Outlets

I have a two pole breaker with three black wires and one white wire. The breaker is 50 amps. The three black wires are labeled "Load Power", and the white wire is labeled "Neutral". Where an outlet ...
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3answers
469 views

3 wire 240 double pole breaker to. 110v single pole breaker

I have 3 wire ( black, white,green) 240 on a double pole breaker. White and black wire connected to breaker green to neutral bar. Want to convert to 120v single pole breaker. Which wire do I connect ...
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1answer
72 views

Add 120 volt outlet to a 240 volt disconnect

I have a 240 volt breaker in my main breaker panel feeding a local outdoor disconnect (black, white, red & ground) for an outdoor sauna. Can I take leads off the black, white & groun, before ...
15
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3answers
7k views

Can I use 220 V outlets on a 15 ampere breaker and wire it up as 110 V?

I purchased a 220 V outlet and didn't realize it. My circuit is 15 amperes. I wanted to hook up a series of normal 15 ampere 110 V outlets. When I look at the outlet it looks exactly like a regular 15 ...
7
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4answers
2k views

Why does my electric oven present the option of 40A and 50A breakers?

The oven in question states 40A with 120/240 volts. In the installation manual: This range is manufactured with the neutral terminal connected to the cabinet. Use a 3-wire, UL Listed. 40- or 50-...
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1answer
148 views

240 volt not supplying 120 over one leg and the neutral

I've got a 4 wire 240 volt receptacle set up to power an electric brewing controller. There is a 240 30amp breaker in my main panel that then supplies a sun panel in the garage that has a 30amp gfci ...
3
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2answers
430 views

Multi wire circuit or 2 separate 120V 20A dedicated circuits?

I'm planning to purchase a portable indoor infrared sauna and locate it outdoors under my deck. The sauna will require a dedicated 120V 20A outlet. I'm wondering if it makes sense to install a multi-...
4
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2answers
4k views

Can a sub-panel have a larger main breaker than the feeder breaker in the main panel?

I have a weird setup that I'm trying to configure, but I'm only 90% certain of my logic (and with electrical items I want to be 100%). I have a new 400A meter/main combo unit with 1 built-in (...
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2answers
78 views

Does anyone know how to split the 240 V wire components of a dryer from the 120 V?

We are living on an island where the electrical grid is already 240V. We shipped a US dryer here and are trying to figure out how to wire it properly (me and local electricians). From my research ...
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3answers
539 views

When splitting a 240v circuit, what happens to neutral's amperage?

My garage has very limited power with only one outlet that I share with 3 bathrooms and every outdoor outlet, 4 total, on a 20 amp breaker. (House hastily thrown together in 97' for your reference) I ...
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2answers
418 views

Powering 220V-to-neutral appliance from 120V split-phase?

I have a 5kW appliance that normally accepts 3-phase power, but can also run on 220V. The manufacturer indicates that when running on single-phase 220V, to connect 220V hot to all three input phases ...
2
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2answers
16k views

Why can't I (or: shouldn't I) run a power cord through a wall?

I would like to wall-mount my TV and have the wall be as clean as possible. I found this box and my idea was to mount this on the back side of that same wall , then run the power cable (and other ...
0
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1answer
2k views

How can I convert a 220v lighting circuit to 110v?

My electrician wired a single bulb light fixture with 220vac instead of 110vac.There are two 110 vac wires and the Ground.How can i reduce this to 110vac at the fixture?
16
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4answers
9k views

240 V outlet is not delivering 240 V

I recently moved into an apartment with a 3-prong, NEMA 10-30 outlet. It looks like this: I bought an old dryer that I confirmed was working before purchasing it and hooked it up and unfortunately ...
0
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1answer
106 views

How to get 110 from 240

We currently have 240 high bay metal halide lights in our gym we bought 110 led high bay lights to replace them ( new fixtures) can i not just remove one leg of the 240 in the breaker box and move it ...
5
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5answers
3k views

Does running a dryer on 120 V drive up electricity costs?

So I have a ventless dryer, and it's a relatively new LG model (LG DLEC855W 4.2 cu. ft. Compact Electric Dryer) that I have hooked up to a 120 V outlet. I know it's not supposed to run on a 120&...
2
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1answer
607 views

120/240 Multi wire branch circuit - failed inspection because of uneven loads?

From a double pole 20-amp breaker, I ran 12/3 w/g to a quad box with a 120 receptacle and a 240 receptacle. Red wire from one pole of the breaker to the 240, ground to the grounds, white to neutral ...
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2answers
144 views

Replace electric water heater with gas tankless (electrical connection)

I want to replace my electric water heater with a gas tankless water heater. My current water heater like most electric hot water heaters takes 220 and the tankless gas water heater uses 120. The room ...
1
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1answer
80 views

How to connect 5-15P plug into 6-20R receptacle?

I have a computer power supply (PSU), input voltage is 120-240V, I assume I can safely plug it into a 240V outlet. I have one those outlets in my garage, problem is that it is 6-20R type receptable ...
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0answers
63 views

120/240 circuit extension

I have a 3-wire 120/240 V circuit running to my garage to an l14-30 outlet for an arc welder. Occasionally I want to run that arc welder in my basement. My thought is to cut the existing circuit in ...
0
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2answers
876 views

Does the metal receptacle box for 6-30 NEMA need to be grounded?

I have a 240 VAC portable heater with a 6-30 NEMA-style plug. I am finishing the 3rd floor of our house. I installed a sub panel fed with a 50A service using 6 AWG THHN. Installed a 30-amp 2-pole ...
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2answers
2k views

Can I add a 120v branch for a washer to a 240v dryer circuit?

I’m running 10-3 Romex for a 240v electric dryer in our garage. It would be very convenient to tap into one hot leg and add a 120v outlet for the washer (they will be stacked). Is this allowed per NEC ...
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2answers
108 views

Wiring for 120 now with 240 option later?

I want to wire a dedicated plugin to the front of my garage for a new EV, which at the moment needs to be 120. But later, I may upgrade to a 240 based charger. Is there a suggested way I could wire ...
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2answers
65 views

Can I use a USA GFCI Intex Pool pump in New Zealand

I have imported an Intex salt system for use on a locally purchased intex pool. when I received it , the plug is a GFCI plug with a test and reset button on it. the pump is a 230w pump. I purchased a ...
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2answers
412 views

I have a 120/240 dryer from Canada, and want to use it in a 240v country.

The dryer electric driagram identifies a RED L1 wire, a WHITE LN one, and other Black as L2. The suplpy cord has a RED, WHITE and BLACK wires and the green ground as well. How should I connect the ...
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2answers
3k views

Getting 120v single phase & 240v three phase out of 240v single phase receptical

Will the following wiring diagram work? This 240v single phase NEMA L14-30R receptacle is right off the main panel with a 30amp breaker. I want to obtain both 120v single phase and 240v three phase ...
0
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2answers
10k views

Can I convert a 240v plug serving a stacked washer/dryer to 120v plug to serve the washer only?

I have a stackable washer dryer combo with one 240V plug. The dryer works on 240V and the washer works 120V, but they have 1 control panel. The dryer died and the room only has one 120v and one 240v ...
1
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1answer
87 views

Added a celing fan in bedroom, need to wire for switch

I recently added a box to install a ceiling fan in our bedroom. We want to convert the single switch in the bedroom to a dual switch. The single switch thats currently in, turns on power to the top ...