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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Looking for ground bus to install 30 amp breaker for 240v outlet [closed]

Is there a ground bus in this panel? It is an old GE panel. I see the white neutral bus but not the ground bus. Please advise on whether there's one .
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1 answer
138 views

Can we pull 120V off of a 240V line for a hot tub without a separate breaker?

A friend of mine bought a used hot tub. Here's the wiring diagram for a 230V permanent power supply: His electrician installed a single 60A breaker in the subpanel. Our best bet based on the wiring ...
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240 volt to 120 volt plug from HVAC blower motor

I am trying to place both germicidal lamps (approx 70 watts total) and a negative ion generator in my air condition return space where the blower motor is. My fist advice was to run these two devices ...
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Reuse Existing 12/2 Romex to Power 220v L6-30R

I have two separate 12/2 Romex lines I ran in my house to a dual 20-Amp outlet (top outlet on one line, bottom outlet on the other). I used this to power a small server rack. I am changing my setup to ...
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240v panel-no neutral

This is the culmination of a few posts (Disconnecting 240 hots without disconnecting neutral?, 240v only subpanel, no ground?) to see if this seems right. I had a subpanel A with 20A double pole ...
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weatherproof in use box/cover for Nema 6-20?

I would like to add 2 infrared heaters to my patio (3000w each) The Bromic eclipse heaters come with 6-20 plugs. It would be nice to have an in-use weatherproof cover so that can stay plugged in full ...
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Powering shed with generator

I built a shed behind my house and want to use it as a small living space in the event of loss of power that can be heated/cooled. The shed is powered by a 30 amp breaker set and has four wires to the ...
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3 votes
1 answer
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Why are there only single pole circuit breakers in my home's service panel?

I got a new home a few months ago and I'm planning to install a 240v outlet to charge my Tesla and just notice that there are only single pole circuit breakers in the electrical panel. I thought at ...
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12 votes
6 answers
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Need to reduce voltage from 245v to under 240v for large printer

I run a home business and have recently purchased a large HP 800w latex printer that requires a 220v outlet. The manufacturer of the printer requires there to be no more than 240v going into the ...
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2 votes
2 answers
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No power in an unused 240v line

I am a newbie, so please bear with me a little. I have two circuits coming from the electrical panel that are 240v each, into my kitchen. One of those is used by a microwave/oven combo and is working. ...
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Gfci on 220v air conditioner unit outside?

I need to run a line to a new ac unit outside. I figured I should only need 2 hots and a ground to supply the 220, but do I need to install a gfci breaker? I am running conduit on side of house.
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Irregular voltage read on 240VAC 1ph Residential

I was called to troubleshoot 1 of 2 minisplit AC units. While testing the voltage on the problem AC, W/ unit off, I got L1-GND=210.6 / L2-GND=9.4 / L1-L2=228 If that wasn't confusing enough, I got ...
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Does the NEC recommend metal or plastic boxes for 240V? [closed]

I need to install a junction box for 240V going to two separate Thermostats for baseboard heaters (one 750W and another 1100W). Should I use plastic or metal boxes for the thermostats and junction box?...
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Can I split a single 2500 watt baseboard heater into 2 smaller heaters?

I am converting a large bedroom into 2 smaller rooms by adding a dividing wall and hallway (see diagram). The large room had a 2500 Watt electric baseboard heater (240V). I would like to use that same ...
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What type of clamp to run bare copper from a j-box?

Need to run a #8 or #6 bare copper from a j-box of another branch. What type of proper strain relief clamp do I need for that? Is it a "Kenny Clamp" or are there any other solutions that are ...
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Can a 120V circuit share conduit with 240V circuit?

I have an existing 40A circuit for my old window A/C. I plan to remove the outlet, pull wire back into basement and terminate to junction box. Then from J-box I'd run PVC conduit thru band joist and ...
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How to run retrofit ground wire to a new (4-wire 50A) receptacle?

I will be adding a ground to an existing 3-wire setup in oder to make it safe and code-complaint. Will the new bare Cu ground wire use the same receptacle knockout (bottom) as the Al jacketed 3-wire, ...
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Is it possible to add a retorfit ground wire to a (3-wire) Type SE, Style U cable from another branch?

Would it be possible to add #10AWG GROUND from another branch (hot-water heater 30A circuit) in order to retrofit ground and replace a 3-wire receptacle with a 4-wire one to be able to use it for an ...
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Help Identify 3-wire SE cable

TRIPLE-E ALLOY TYPE SE CABLE STYLE U TYPE XHHW CDRS 600 for electric range Follow up question: Is the 3 wire a grounded neutral conductor or an equipment grounding conductor?
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12 votes
2 answers
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I’m trying to make a 220V power cord

My plasma cutter has a 3 prong 220V power cord. I want to make an extension cable that I can plug into my dryer's 4 prong 220V outlet. I have a 3 prong receptacle to put on the other end of my cord ...
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1 answer
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How to wire this 4-wire range terminal block with pin style connectors?

Could you please help me determine how to properly replace this 4-wire cord that has pin style terminal with a 3-wire cord that has ring style terminals? terminal block on the range: old 3-wire cord ...
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14 votes
2 answers
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If my 240v cooktop does not have a neutral, is it safe just to cap the neutral and leave it?

I bought a cooktop which has 3 wires: Black Red Green The wiring in my home is 4 wires: Black Red White Bare I saw the instruction for 3-wire to 4-wire connection, it states to leave the white ...
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8 votes
3 answers
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Alternative GFCI Wiring in Strict 240V Scenario?

I have a strict 240V wiring situation (i.e., two hots + ground, no neutral) with a hot tub as the only load on the circuit. Now, I think it’s very prudent (and generally mandated) to have a local ...
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1 vote
1 answer
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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 ...
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2 answers
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Is there a problem with future proofing my welding outlet?

I'm doing a fairly major remodel on my garage/workshop and so have the walls open. I'm installing an outlet for running my welder. Currently I have a small welder that needs a 30 amp circuit but I ...
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6 votes
3 answers
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EV charger wiring - sub-panel requirements

I am looking to add a 30A outlet in my garage for the purpose of charging an EV. My home has 200A service coming through the main panel, and currently there are no sub-panels except one for the ...
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220v heater in garage

I currently have a 50 amp 220 breaker in my breaker box and a 50 amp outlet in the garage(I think it used to have a washer and dryer). I bought a garage heater that is 20 amp so the plug doesn't ...
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1 vote
1 answer
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How do I replace a generator's 4 pin socket with a 3 pin socket?

I acquired a Briggs & Stratton "Storm Responder" 6250 watts, 8500 starting watts 1850-series 425cc generator. It´s American. I now live in Spain - were 240 volts as normal. The generator ...
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2 votes
2 answers
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Is #8 wire suitable for an oven on a 50A breaker?

My house took considerable damage to the roof and electrical supply to my home in a wind storm. The main breaker panel was in a sorry state and so while the damage did not technically reach the panel ...
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Can an exterior 240v cable be used for two different applications via a switch?

I have a dedicated 240V line run to my backyard to power an electric shed heater (240V). I plan on putting an above ground pool in the summer, and would like to get an electric heater for the pool. ...
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3 votes
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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, ...
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9 votes
3 answers
1k views

Can I change the plug on this 240 V device?

(In the US, Ohio): We had our electric to our home professionally redone a couple years ago, so that we could hook up a kiln in the garage. This all works great. We recently got another smaller kiln,...
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2 votes
1 answer
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Underground garage supply conduit standoff

I had 100 amp underground service to my old garage. In 2” conduit PVC SCH 40, 24” trench, code USE wire size, slip joints, etc While building the replacement garage, Contractor poured the new slab in ...
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What is the best wiring for NEMA 14-50 receptacle in a 240V country?

I moved from US and I would like to install a NEMA 14-50 in my home outside US for my EV car. I am outside the US and electricity here is 240 volts. I wonder if I can wire it in this form and do I ...
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1 vote
1 answer
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How to install this European Sauna Heater/Controller in Canada?

I have recently purchased this 9KW European sauna heater: A similar question was asked in this post. I am looking for more specifics on how to connect the TECK cable from the breaker box into the ...
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1 answer
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Using a double throw switch to split 240v circuit to two appliances. Does neutral need to be switched?

I'm looking to add a switch to an existing 240v circuit to switch power between two appliances. Do I need a 2 pole switch and just have the neutral attached to both appliances or do I need a 3 pole ...
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3 votes
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How to tell whether a breaker panel can meet certain electrical requirements

I am a homebrewer and am planning on buying a fancy new piece of brewing equipment for my basement brewery. The electrical requirements of this equipment are as follows: 4 wire, 240V line for power ...
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3 answers
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Upgrading wiring to detached garage subpanel

My garage is a 2 car detached garage is approximately 33ft from the house. My current setup (previous owners doing) is a 15a breaker (main panel) to 12/2 UF in a metal (aluminum?) piping that runs ...
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1 vote
0 answers
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240v at the breaker not the other end

I have a well pump on what I pretty sure is a dedicated 240v/60a circuit. I have had to run a new line for part of this circuit and replace a segment. I connected the new segment at the same point ...
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1 vote
1 answer
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Where are the two pole CAFCI/GFCI breakers?

Why aren't there very many (any?) two pole dual function breakers? Is a GFCI + CAFCI breaker less useful for 220 or MWBC? Is it be prohibitively expensive? Or is there no demand because not many want ...
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2 answers
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Which conduit to use

I'm installing a 220 volt 30 Amp plug for a scuba compressor. I'm installing it my sun room. There is a hole in floor trim already from the old heating system so I was planning on using that. Run ...
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0 votes
2 answers
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Can I make a new ground pipe at an outdoor appliance instead of running a separate ground wire?

I have two legs of my 240 V appliance and the neutral wire, but no ground wire available, but plenty of room for burying a ground pipe and strap. Can I just drive another ground pipe at the location ...
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240v 50A on the same line as a 50A RV outlet

I'm looking to install a 50A RV hookup which I understands translates to two 120v parallel circuits with a shared common. I'd also like to have 50A 240V outlet in the same location allowing me to ...
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8 votes
3 answers
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Splitting 240V into two 120V Circuits

I think I have this figured out for the most part but looking for validation from expert strangers on the internet. Renovated the kitchen in this 1960's house. I think it probably has been renovated ...
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240v Garage lighting

My Garage has four, four-bulb flourescent light fixtures (T8). I am removing the ballasts and replacing the bulbs with LED bulbs. No problem there. While doing this, I was surprised to discover the ...
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1 answer
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Using an 8a 240v dust collector on circuit with 50a breaker

The prior owner of the shop had, I believe, outlets for welding equipment which were 50 amp 240v outlets with old NEMA 10-50 outlets. But, he was forward thinking enough to have a ground wire behind ...
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1 vote
2 answers
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What size wire for a 60A Tesla Wall Connector?

I am in the processing of installing a 240v Tesla wall connector on a 60 Amp breaker to draw max 48 amp. Distance from panel to site is approximately 110 feet. I want to go with a cable that has 3 ...
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7 votes
4 answers
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A 240V heater is wired w/ 2 hots and no neutral. What should the voltage between two hots read?

How come I am reading 120 between each hot and ground and 0 between 2 hots. What is this an indication of? Thanks! (i'm in USA)
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2 answers
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Can 4 wire 240v circuit 30amp also support a 120v outlet

I'm planning to run a four 10g wire 30 amp circuit to supply 240v for an electric dryer. I'm wondering if I can add a 120v outlet to this and only use one outlet at a time on the same circuit, instead ...
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How do I wire a single phase 240v APC UPS from US split phase power?

I want to wire in a 200/208/220/240v single phase APC UPS, the APC Smart-UPS RT 6000VA, there are both single and split phase versions of this, I have the single. It has the standard brown blue green ...
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