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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1answer
77 views

What to make of electrical rating etched into circuit breaker?

This is an extension on a previous question about a 240V outlet in my garage. At that time, I took the advice that I should: replace the 40A breaker in the garage with a 30A version (from the proper ...
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1answer
79 views

What are the unused 240V breakers in my panel for? [closed]

The main service panel in my house has eight 2 pole breakers in it. It breaks down as: 2 40A breakers for the AC units 2 50A breakers for the furnaces 1 40A breaker for the stove 1 30A breaker for ...
2
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1answer
64 views

Is THWN wire appropriate for an underground vehicle charging circuit?

We recently purchased a Tesla Model 3 and are planning on adding a 240V NEMA 14-50 outlet in our detached garage to improve charging speeds. Tesla's documentation specifies 6 AWG copper wire with 4 ...
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1answer
23 views

Is 10/3 @ 240 with ground good enough for a short run from sub panel to sauna heater?

I'm no pro, so I'm sorry in advance for doing my own work, but I enjoy the learning and experience. I've run aluminum 4/3 out to a new sauna with a sub-panel, roughly 100', which houses 2x single pole ...
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3answers
60 views

How can I safely connect a 240v shallow well pump to a switch?

I have a shallow well supplying utility water on a rural property. It's currently plugged into a standard 120v outlet. I'll be running a dedicated 240v circuit using 12/2 cable so I can use the pump's ...
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1answer
172 views

Why does my 240V range outlet have five wires?

We're planning to install a new gas range with an electric oven in the spot now occupied by our gas cooktop. The previous cooktop was a broken 70s electric that the owners had disconnected from the ...
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1answer
95 views

50 amp circuit breaker for a 30 amp electric oven?

My new 30 amp (240v) oven tripped a 50 amp breaker, and now will not heat. The warranty repair is happening, but here's my question: should I just put in a 30 amp breaker to protect the oven from ...
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1answer
54 views

Can I install 2 240v baseboard heaters in separate rooms?

Can I install "2" 240v baseboard heaters in separate rooms? supplied by "1" Quad 2-pole 240 volt circuit breaker with a 10/2 or 10/3 wire? each baseboard heater pulls about 500 to ...
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3answers
37 views

New GFCI to replace one that was in the subpanel of a hot tub

I have a dedicated 50 amp 240 v circuit to a hot tub. Had it over 15 yrs no problems. Recently the GFCI that was in the sub panel would buzz and then trip or sometimes work just fine after resetting....
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1answer
48 views

Can I power a german 240v spindle motor off of a USA 240v nema5-50 welder plug?

I have bought this spindle for use on my cnc router. https://www.amb-elektrik.de/produkte/fraesmotoren/636/amb-fraesmotor-1050-fme-u-di-230v-fuer-er16-praezisions-spannzangen I have contacted the ...
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1answer
108 views

Any reason *not* to put electric oven on GFCI breaker?

I want to tap my electric oven's existing circuit to add a NEMA 6-15 outlet in my kitchen for a 240v kettle (the oven is rated at 21 amps and the breaker is 40 amps, so I think I should be OK adding ...
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1answer
111 views

What are some reasons that my 240V clothes dryer connection (outlet) suddently only has 18V per side?

My clothes dryer suddenly stopped working and I wasn't sure if it was my (new) dryer or the power outlet. Things I Tried I checked the circuit breaker and reset it but the dryer still didn't work. I ...
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1answer
74 views

Voltage on 10-30R metal faceplate

I just moved into a new house where there are two 240 volt 10-30R outlets in the garage, each with a 30-amp breaker and 10 gauge wire. Voltage across the hot terminals is 247 and, of course, ...
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1answer
62 views

Turning old AC wiring into a simple 120V outlet?

UPDATE: Resolved. The ground wire was located behind the box, in the wall. It's a bit short (??) but it will do once I put the subpanel in. Thanks for everyone who responded. I am tracing the somewhat ...
2
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1answer
112 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 ...
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0answers
64 views

Garage outlet causes unrelated outlet's breaker to trip [closed]

When I use the power outlet (240v, 15A) outlet in my garage, it trips the breaker for the power in my home office upstairs. What is also interesting and concerning is that the breaker for the garage ...
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0answers
77 views

How do you wire a 250 volt plug when you need 240 volt power for a hot water heater

I have a 50 breaker/ plug in a temporary RV power source. The hot water heater I have needs 240 volt. How do I connect the wires on the 50 amp plug so that it runs the 240 volt needed for the hot ...
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3answers
92 views

A/B switch for Two 240V connections into Electrical Panel

I have 125amps coming into my house from PGE and my panel is 125amps and has a few free breaker slots. Currently I have a 240v oven, 24v clothes drier, 240v floor heating and 240v EV car charger (...
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2answers
63 views

How to connect a 4-wire range from this panel?

I am trying to connect a new 4-wire range in a new location in my house. When I removed the old cover I see 3-wires connected 1) red 2) black, and 3) green. If I understand correctly, red and black ...
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4answers
3k views

How do I wire a modern 240V 3 prong range to a 250V 50A 3 prong outlet?

This is for wiring in the United States. My wife ordered a new GE electric range top, and it came with a 3 wire flex conduit permanently attached. I cannot change it. It has a black wire, a red wire ...
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1answer
111 views

Can I install required breaker in my electrical panel?

GOAL: installing an external 240v wall outlet to power a future air compressor. I have attached a picture of the electrical panel in my house. I would like to understand what I am looking at in the ...
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2answers
2k views

How to wire a 4 prong outlet in my generator to 3 prong dryer?

I have a generator that I want to be able to run most of the house on in the event of a hurricane, I live in SE Texas. I also have a couple of welders that I plug into my dryer outlet via 8/2 Romex. ...
2
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2answers
111 views

Is #10 wire correct for my mini-split system on a disconnect?

I have a disconnect box that is on a 50 amp breaker connected to a disconnect box using 6 AWG. In order to connect my mini split system to the disconnect do I use 10 AWG wire based on the information ...
4
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1answer
81 views

Replaced my first power cord. Will I set the house on fire?

I’ve replaced the power cord of an appliance for the very first time. How does it look? I have switched the appliance on for 3 mins and there were no fires. I just want to make sure it’s safe. It’s a ...
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2answers
68 views

House wide 24v dc on single extra conductor?

Is it feasible to provide a house wide 24v DC supply that uses mains neutral or ground for the -ve side? Edit: I removed reference to "NEUTRAL OR ground" because risks, and RCDs, per answers....
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2answers
97 views

Can I connect my EU 230V 2.8kW appliance to a US 240V 20A receptacle?

The appliance is a pizza oven with Schuko plug [Picture 1], running at 240V 50-60Hz 2.8Kw. The receptacle is a US 240V 20A [Picture 2] to which is currently connected the PTAC [Picture 3]. Sharing the ...
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1answer
62 views

Mounting Electric range when stud is on the center line?

I am installing 50 amp circuit for a basic 30 " freestanding electric range, The range I settled on is 40 amp. The instructions included say they do not recommend a 50 amp power cord from the ...
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2answers
55 views

Convert MWBC to single 240V receptacle

I currently have a 20 amp double pole breaker supplying a multi-wire branch circuit for two 120v receptacles in a double gang box. I'd like to remove the 120v receptacles and install a 240v receptacle....
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1answer
92 views

Add 240v Outlet to Apartment Subpanel

I am looking to install a washer/dryer system in my apartment and have received mixed feedback about whether a 240v outlet can be ran through my existing subpanel to power the dryer. Is there any way ...
2
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3answers
195 views

Wiring for kitchen remodel - appliances, electric oven/microwave combo, fridge, 2 dishwashers

I am working on a plan for a kitchen remodel. The existing range is natural gas powered so it doesn't have a dedicated circuit (It's just plugged into a 15 or 20amp outlet). Other existing wiring ...
0
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1answer
217 views

Running a 50amp 240V line 300 feet to a shed

I'm looking to run a 50 amp 240v line to a shed 300 feet from my house. I have been looking around and reading a lot. Based on this website for voltage drop I need 4awg, to have a less than 3% drop ...
7
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3answers
1k views

What purpose does a 3+1 outlet/circuit provide when the neutral bus is grounded?

I'm trying to wrap my head around what the benefit is of having to use a 4-prong outlet for newer appliances when it appears the neutral and ground both end up in the same spot. In a dual pole ...
0
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1answer
38 views

Flipping switch (by itself) trips breaker

I have a 30A 240V circuit breaker I have added to the panel to run a saw. From the breaker, it goes to a switch on the wall, which is high enough that the kids cannot reach. Using a multimeter, I have ...
3
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1answer
269 views

Wiring for shop: 240V with light switch on same circuit?

See below for (attempt at) solution I'm wiring up a shop I'm putting together and came up with a plan with my electrician but I'm a bit confused on how to execute it. Namely, I'm trying to put a 240V ...
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1answer
94 views

Sharing a 240v 30A circuit using a dial switch

I have a situation where the previous homeowner installed a sauna using the dryer plug. You have to unplug one to plug in the other, a setup that is not only ugly with the sauna plug hanging in the ...
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2answers
125 views

Can a 120v pool timer be used on a two-wire 240v circuit?

I am replacing an Intermatic mechanical T104 single circuit timer with a new Intermatic P1353ME unit that can control 3 individual equipment items in addition to the timer clock. Each of the three ...
2
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2answers
127 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 ...
0
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2answers
56 views

Adding an EV Charging Station to an AC Circuit

We just had a air conditioner compressor installed last week. The contractor installed a new 240V 30Amp circuit to the compressor. We are also wanting to install a new EV Charging Station (which is ...
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0answers
159 views

Sub panel 3 wire and 220Volts

My mom just bought an old house (1917). The Main Breaker has 3 wires two hot from a 30amp 220 breaker and one ground going from the main into a sub-panel, there is no room to feed a 4th neutral wire. ...
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2answers
100 views

How can I pull single phase 120V from a 3 wire two phase 240V drop?

I want to run a couple of 110 volt plugs from a box that has 240 volts. I understand that I can't just use one of the two hots and wire both the neutral and ground to the 240V neutral. My question is,...
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2answers
112 views

Change a NEMA 6-15 plug to fit an NEMA 14-50 receptacle

I have a 240 volt dust collector with an NEMA 6-15 plug. I want to plug it into an NEMA 14-50 receptacle. The 6-15 has three leads, while the 14-50 has a fourth (neutral). Can I change the plug and ...
0
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2answers
107 views

Different gauge wire for a 40 amp 240v

I am moving my range. I need an extra 4 feet. It is very difficult to run new wire. It is 8 gauge aluminum wire (says on sleeve 2-8). Can I connect 6 gauge aluminum to the 8 gauge aluminum in a ...
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1answer
165 views

Wiring to Water Heater not getting 240v

The wiring to my Water Heater is not getting 240v, and the Water Heater won't work. I've tested the wires at the Water Heater (touching black to Black, and red to red on my electric meter) and I get ...
5
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1answer
312 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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5answers
4k views

240 Volts - No Neutral Required - How does Power Return to Earth?

I think this question is appropriate here in order to help DIYers (me) to understand why a neutral isn't needed on a 240 volt outlet. I understand that two 120 volt power sources that are 180 degrees ...
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1answer
96 views

Plugin 220 adapter OK for higher amperage appliances?

I have used 220 volts from European outlets before via an adapter tool (it probably cost me 20 dollars and I probably have it around the house somewhere). But that was only for limited uses like ...
2
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2answers
364 views

Does a 240v subpanel need a neutral?

Was curious as I've seen plenty of pages indicating that a 240v circuits don't require neutral... in my head that means a branch circuit but I don't know if that is accurate. My specific case is that ...
4
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4answers
1k views

I want to install generic capability for future car charging. What 240v outlet on the outside of the house is acceptable?

I am wiring an old house with new wires and want to have an outlet outside for charging a potential electric car. There is no carport or roof overhang, so weather resistance is important. The wall is ...
4
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1answer
124 views

Are my plans for adding a 240 volt circuit reasonable?

I was hoping I could run this by someone. I've done other basic homeowner electric work like adding 120 breakers and outlets. From reading online, adding a single 240 volt circuit next to my breaker ...
2
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2answers
108 views

240v 3 prong - no voltage with neutral

My 3 prong 240v outlet shows 240v when measuring across red and black wires. However, when testing either hot to the third wire I get 0 volts. My understanding is it should be 120v. What does this ...

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