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Questions tagged [240v]

For questions dealing with 240 volt electrical circuits, devices, and equipment. This tag covers the similar voltages as well (i.e. 220, 230, etc), since they generally refer to the same thing. Use with the [electrical] tag.

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Hooking up an Australian motor in USA

I have an Australian motor (240V single phase, Type I plug) that I want to use in USA. Australian 240V is 240V+Neutral+Earth(Ground). US 240V (NEMA 6 outlets) is 120V+120V+Earth. Can I simply rewire ...
1 vote
1 answer
67 views

#8 wiring to mini split keeps getting hot with only 20 Amp draw?

Okay I'm stumped here. I just had to repair the wiring to my mini split for the second time. The first time was last year when a fuse able link burned out at the unit. This year the wire at the ...
33 votes
8 answers
50k views

Why am I getting an electric shock from the water in my hot tub?

I have noticed that when I touch the water of my Hot Tub when I am grounded (barefoot standing outside of tub) I am getting a very small electric shock. Using a multimeter it is reading 2Vac between ...
0 votes
1 answer
48 views

Can I split a 220 on an old house if I add a neutral wire?

I'm working on my late brothers house and need a 110 for the sump pump and one for the furnace. The house was built/wired in 1922. It has a 220 that was used for heating/AC, but it is a 3 wire circuit....
1 vote
1 answer
144 views

Is it possible that a 240V wall heater is connected to one breaker?

I have an old wall mounted electric heater. It takes 240v. I only see two wires that it’s connected to and at the breaker box it’s only connected to one breaker. The breaker that it’s on only has one ...
1 vote
3 answers
37k views

How to wire multiple 240V, 20A electrical baseboard heaters

I have two baseboard heaters to install on a 240V, 20A circuit. One heater is 1500w and the other is 2000w. From my panel, I leave the 20A breaker with 12/2 wire to reach the first baseboard. ...
5 votes
2 answers
1k views

Do I have room to add a 240V breaker in my panel?

I’m trying to see if I have room to add a 240V line for a mini split. The mini split I got is a Gree with nominal 9 amp pull and manufacturer recommended breaker size of 20 amps. Any thoughts on an ...
4 votes
3 answers
1k views

Running two dryers same circuit, controlled by switch [duplicate]

I have two dryers side by side in my basement, one is for a dog washing business. One is for my clothes. I don't need both running ever at the same time so I currently just unplug and plug in ...
7 votes
4 answers
37k views

How can I switch between two 240V 30A loads?

I've got a situation where I have a 240V 30A dryer line, and I want to power something else from the same circuit, but NEVER at the same time as the dryer. I'm looking for a switch to use, like a DPDT ...
0 votes
2 answers
109 views

How can a 240V device with a single hot terminal be wired with two 120v hot wires?

US based. I am looking to install this radiant floor themostat: https://www.homedepot.com/p/QuietWarmth-120-Volt-240-Volt-7-Day-Programmable-Floor-Warming-Thermostat-THERMPRO/318528774 The thermostat ...
3 votes
3 answers
47k views

Can I extend a 240 V line?

I have a 240 V line in my kitchen for an oven. We are remodeling the kitchen and moving the oven and, thus, need to move the 240 V outlet. Can I extend the line by joining cables in a junction box ...
3 votes
1 answer
61 views

New 40Amp cooktop, should I run 2 wire or 3?

My old 30Amp cooktop finally gave out. Picked up a new one that is 40Amp and requires a new 8 wire. The cooktop is only a 2 wire connection. Is there any value in running a 3 wire with neutral? The ...
2 votes
1 answer
2k views

How can I convert Single Phase 220v to 2 Phase 120v?

I purchased a SMA Sunny Boy 5.0-US-41 Inverter and brought it to the Philippines. Many connections in Manila are 2 Phase 120v. I am in the province, where we have Single Phase 220v. I called SMA ...
0 votes
2 answers
100 views

Drawing up to 12kW through a NEMA 14-50R at 120V

The 14-50R has L1, L2, Neutral and GND connections. Of course, you can draw 12kW across L1 and L2 by pulling 50A from the circuit. In this case, there is 50A flowing in each of the L1 and L2 wires ...
0 votes
1 answer
103 views

Is my 240v outlet wiring adequate for a welder?

My garage has a 240v outlet and when I tried to switch the breaker on it tripped the main. The garage has a breaker box that is wired into the main house box. The main box (200 amp service) has two ...
0 votes
2 answers
113 views

How to convert unused 3 prong, 250V, 50A, F receptacle to regular 120V one?

I have an unused 3 prong, 250V, 50A, F receptacle in my basement. Is there an adapter out there that can convert this to 120V? Since it is 3 wire (including neutral), I believe we should be able to do ...
0 votes
1 answer
464 views

Can I protect a 240V water heating with no neutral using a GFCI breaker?

I recently purchased an instant water heater. They get around using 10ga wire by utilizing two hots and a ground on a dual pole 15amp breaker over standard 14/2. I was advised to use a Ground Fault ...
3 votes
4 answers
3k views

Do I need to update my NEMA 10-50 receptacle with no neutral for NEC 2017 code compliant?

I have a lengthy 6/2 run with no neutral and two hots. The oven appliance is configured in 3-wire with the grounding strap connected on the appliance. I have to extend this run by 4 feet via splicing, ...
0 votes
1 answer
117 views

Adding 240 V Circuit Through Attic

I am planning to add a new 240 V circuit to install a induction style range. There is an abandoned 240 V outlet at the location when a gas range was added however this is a 2 wire system without ...
2 votes
1 answer
35k views

Adding GFCI to a 240v outlet

I recently added a 240v/30amp outlet to my garage for the purpose of an electric homebrewing system. After doing some reading, I see that it's highly recommended that the outlet be GFCI because giant ...
1 vote
2 answers
106 views

Use one leg of oven's 240v supply, to simultaneously power a 120v microwave?

I just removed a double wall oven, because the control panel had partially melted. (I suspect the previous owner used the self-clean function, which in my opinion is an anti-feature for ovens.) ...
0 votes
2 answers
4k views

Should I use /2 or /3 cable for a NEMA 6-20R oulet?

I need to wire up a NEMA 6-20R and have both 12/2 and 12/3 cable available to me. Most diagrams I’ve seen show the hot’s to the horizontal spades (X and Y) and the bare ground to the Ground lug on the ...
0 votes
0 answers
104 views

Mini split plug into existing 220 outlet?

I’d like to use my dryer 220 outlet to power a mini split. Can the 220 from the mini split be plugged into that outlet?
2 votes
3 answers
1k views

Is it safe to bond the neutral to the junction box in a Nema 10-30 circuit?

I have a 1940s house with a Nema 10-30 receptacle for the dryer. Halfway from the main panel, this circuit is spliced in a junction box, and in that box, I see there are only 3 wires: 2 hot and one ...
0 votes
4 answers
27k views

240V outlet not working, reading 120V on each leg, 0V between legs

I have a woodworking shop with 3 - 240V outlets. I recently had some electrical work done in the house and now one of the outlets doesn't work. Testing the 2 working outlets (see below) I get 120V ...
7 votes
2 answers
2k views

Can I run wires from separate panels through the same conduit?

I own a duplex and the attached shed is divided in 1/2 for each side of the duplex. On the rear exterior are the 2 electrical panels, one for each side of the duplex. I was going to install hookups ...
9 votes
3 answers
2k views

Is this 240v circuit to garage for electric charger good or did I miss something?

I'm adding a circuit to my garage for an EV charger. Yes, I have pulled a permit. I live in Massachusetts. Here's my plan: I'll be adding a new 60 amp GFCI breaker to the panel. Yes, there is space in ...
0 votes
1 answer
288 views

pool heat pump wiring instructions DOEL 19000btu, 5.56 kw, 220v single phase

I am trying in install Doel UHP056CS, name tag says 220 volts, however it comes with a pigtail already wired with a standard 110v male cord. Power Input label L, N, Ground, (three connectors) Water ...
-1 votes
1 answer
115 views

Wiring 6-50 Welding Outlet [closed]

A couple clarifying questions on my welder outlet install. Prior thread: 240v Welding Outlet Right Near Breaker Box One issue is that since I don't have any real NEC knowledge - it seems that every ...
1 vote
1 answer
187 views

How do I wire a 4-wire 220v cooktop to a 3 prong plug?

I just bought a new cooktop which comes with 4 exposed wires. It also comes with a diagram on how to configure it using a NEMA 10-50p type plug -- which is great because that matches the type of ...
1 vote
3 answers
155 views

240v Welding Outlet Right Near Breaker Box [closed]

I have a garage where I want to install a 240V / 50A outlet. The garage is finished with drywall. I want to place the outlet adjacent to the outside breaker box (but inside). Questions: What wires ...
2 votes
1 answer
97 views

Need help adding 240V outlet to my residential garage

I am adding a 240V outlet to my garage, wired from directly outside the garage (12" from panel to outlet). I have a conveyor dryer unit for a small business I run from home. This unit has a 4 ...
1 vote
2 answers
4k views

Can I feed a sub panel off my 200A service box? Or would I need to run wire from the inside breaker box?

Can I add a sub panel feed off my 200A service box? If so what are the requirements? Or would I need to run it from the main house breaker inside the house and wire from there? I currently have a ...
0 votes
0 answers
55 views

220v equipment in different areas of my home having intermittent issue

I live in united states. washer and dryer in laundry room in my home microwave and oven in the kitchen area has been turning off after 8-15 seconds of operation every now and then. oven displays bad ...
0 votes
2 answers
38 views

power point is turned off but usb charger led still flicks on

I have a 240v power point, the switch is turn off but a usb charger i have plugged in flashes about once every two minutes. Why would it flash if the power switch is off?
1 vote
7 answers
48k views

How many amps per leg on a 220V circuit?

If the nameplate on a piece of 240VAC equipment says 10.0 Amps, does that mean that the load is 10 amps per leg, or 10 amps total, therefore 5 per leg?
0 votes
3 answers
121 views

Single pole relay on a 240VAC split phase circuit?

I'm installing an EV charger but my panel is only big enough to run either the dryer or the EV charger at the same time. So I have a current sensor on the dryer line so that when the dryer is running ...
10 votes
1 answer
2k views

Can I install and safely use a British 220V outlet on a US 220V split-phase circuit?

I have a British tea kettle I like very much. I have space in a subpanel in my kitchen for a 220V 15A circuit. If I purchased a British receptacle and wired it across the 2 hot wires, rather than the ...
0 votes
1 answer
72 views

Installing a 220v breaker

I’m adding steam humidifiers to our two HVAC units, they currently run on 110v but will double the output on 220v which we need. I’ve pulled 8 gauge wire to the panel box and will terminate in a ...
4 votes
2 answers
142 views

240V Four Prong Outlet - Inconsistent Behavior

An odd issue arose with my dryer outlet, and I am more concerned than initially. Below are the chain of events: Dryer: Samsung dryer spun, but did not heat Replaced heating element Plugged in, did ...
0 votes
1 answer
106 views

For detached garage: buried cable or overhang? [closed]

I am a DIY guy, looking into bringing 240v into my detached garage. Will be running air compressor, welder. Will install a 100amp Subpanel. Should the cable coming from the house (main panel) to the ...
4 votes
3 answers
7k views

Help with sauna heater wiring diagram

Hoping to get some help understanding this sauna heater wiring diagram. Pics at bottom. Disclaimer that I have an electrician friend "helping" (not for free though!) me on the weekends so I can't go ...
2 votes
4 answers
18k views

What could cause a 240v dryer outlet to have proper voltage but not power the dryer?

I bought a used washer and dryer about a month ago from a warehouse dealer that specializes in used appliances. The dryer worked for about a month then refused to operate. I called the appliance guy ...
2 votes
1 answer
130 views

Can I use a 120v load tester to test a 240v circuit by testing each hot wire separately using the ground wire as the neutral?

I have an old house and want to make sure that the wiring for all of the 240 baseboard heating units are still up for the job and not likely to overheat or have any conductance issues. No obvious ...
0 votes
2 answers
443 views

How to run a 220v mini split on 110v wired home

I have an off grid apt in Baja California Mexico. The apt is wired for 110v. I would like to integrate an ac200max solar generator as well as a 550w dual dual generator. How can I integrate all of ...
0 votes
3 answers
87 views

120v AFCI breakers tripping due to lost 240v leg in same panel

I had a weird electrical problem and found the fix, but I'd love to understand the mechanism by which this happened. Disclaimer: I'm not an electrician, buyer beware, etc. The symptom I had was 3 ...
1 vote
0 answers
75 views

How do I wire my 3-wire cook top where there used to be a 4-wire one?

I am changing out a 25-year old 240v cooktop with a new cook top. The old cooktop had 4 wires and the new one has 3. After the white and green, the junction box has 1 set of 2 purple wires that the ...
1 vote
1 answer
408 views

Install Honeywell RLV4305A in box with 6 wires

I am trying to install the referenced thermostat for my baseboard heat in one room. I did follow along this post 2 wires, both hot, for 240v baseboard thermostat After color coding my wires that post ...
1 vote
1 answer
220 views

Older 220V heater wire keeps burning out

I have an older 220V heater that came with the house I bought. It worked wonderfully for years, but then a wire burned out and each time I replace it, it burns out again within a week. The original ...
0 votes
2 answers
266 views

Single phase induction stove push in quick connector difficult to connect

We had to change the current stove we had for and induction one (long story) which I also installed. With this new one, I have a 5 wire single phase setup. I think it is because each stove module ...

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