Questions tagged [120-240v]
For question dealing with 120/240V single split phase electrical circuits.
124
questions
0
votes
0
answers
30
views
240 volt patio heater on timer won't turn off
We had a 240V ceiling mounted patio heater installed 10 years ago and last year the timer switch started buzzing loudly when the heater was turned on. I swapped out the timer switch with what I ...
0
votes
1
answer
56
views
Dead Electrical Leg - Ground or wire-nut and “Abandon”/Tuck?
I have a mess of a “finished” basement in CA (California) that was wired atleast 4x 1922, 1940-50, 1980 and again in 2020, before I came to own the pile of garbage.
I am redoing a lot of the wiring ...
- 125
0
votes
2
answers
211
views
Installed Tesla gen 3 home charger with 60amp breaker and car pulling 48 amps. The conduit from charger to power panel is approx 4 ft
The conduit gets so hot you can't keep touching it. The certified electrician used #6 THHN. should #4 wire be used?
0
votes
2
answers
61
views
Wiring thru the wall A/C
I need to wire a 20 amp, 240 volt, single yoke, double pole breaker for a thru the wall A/C. Also reknown as "115/240". Using 12g wire running 40 feet. I've seen this done using 12/2 and ...
- 19
3
votes
1
answer
325
views
Should I cover this exterior 120V wire?
I have an exterior wire in the garden. Most likely this is the connection to the external lights. Should I cover this and how? I'm in Seattle, which is usually wet outside.
15
votes
7
answers
4k
views
What are the advantages of running a power tool on 240 V vs 120 V?
I just purchased a band saw and I have the option of running it at 120 V or, by opening the cover on the motor and swapping around a couple of wires, running it at 240 V.
In general, I understand that ...
- 40.6k
1
vote
2
answers
117
views
Cross Check: 120v-240v combo circuit over subscription
I am looking to confirm my understanding of how my circuit would fail on an over current event.
I have a single phase 40a 240v circuit run with four 8awg solid copper wire (two hots, neutral, and ...
- 13
9
votes
7
answers
7k
views
Will installing European outlet in US change frequency to 50Hz?
I'm planning to buy a Siemens coffee machine from Europe. It uses 220-240V 50Hz. Previous models work just fine in USA using 240V outlet (my electrician was able to get it done, I bought leviton 5031-...
- 107
4
votes
2
answers
442
views
Should non-working US 110V AC GFCI outlet that shows open neutral, but trips and resets fine be replaced?
I have a GFCI outlet that has not worked for a while. The downstream outlet (there is only one from what I can tell) connected to it worked for a while, but no longer does.
I decided to find out more ...
- 151
2
votes
1
answer
274
views
Why would each leg suddenly read 240 volts power drop in part of my house every 5-10 minutes?
Problem started when I woke up with no power in my bedroom. I checked the box and no breakers were tripped, so I tried to turn on a tv that I have hooked to my security system. The tv went up in ...
0
votes
1
answer
76
views
Thermostat to control electrical baseboard heater
I wanna install 8 electrical baseboard heaters. So I need 3 circuits so I won’t over load them. So I wanna know if there’s a way to just install one thermostat
0
votes
1
answer
53
views
Need to run 2 110 AC from a 220 4 wire drop line on a dual 30 amp breaker
I have a $0 budget I need to run 2 110 AC units on 1 240 10g 4 wire supply line on a dual 30 amp breaker. Is this possible
0
votes
3
answers
100
views
How Important is addressing Ground Reverses?
I have one of those pocket checkers. It indicates a "Hot Ground/Reverse" on one outlet and a "Hot Neutral/Reverse" on another outlet.
Should I be worried? Should I avoid those ...
- 192
4
votes
3
answers
3k
views
Can I jump 120V across legs to power both sides of a panel?
I have installed a new sub-panel in our barn. We do not need a lot of power so I only ran 8/2 copper. My intention was to make the sub-panel 120v only by using a jumper for the second hot lug. Now I’m ...
- 41
2
votes
1
answer
732
views
Combining 240V and 120V outlets on the same circuit
I have a unused 20amp double pole circuit breaker (240/250V) at the panel. I would like to use it to control one 240V outlet (with L1, L2, G connections, no neutral) and two 120V outlets.
My thinking ...
- 69
0
votes
1
answer
173
views
Feeding a breaker panel through a 120v outlet [closed]
Okay...so I have a shack we use during events. It has 240 panel inside that feeds 3 florescent lights and plug in. It was powered through a 6awg power cord that plugged in to an outlet off of a power ...
- 11
0
votes
2
answers
70
views
Can you replace a 120 V outlet w/ 240V outlet if there are 4 other 120 V outlets on the existing 120V breaker? Can a 240v breaker also run 120V?
I installed a dedicated 240 V outlet next to my breaker box outside to power my new A/C. I am currently running an extension cord. I would like to replace an existing 120 V outlet inside the house ...
- 1
2
votes
2
answers
512
views
Pulling a 120v outlet from an existing 240v hot-water heater line
I have a 240v hot water heater that is directly wired ... meaning the heavy cable from the wall goes into the water heater.
I want to add a powered anode to deal with sulfer-smelling water and the ...
- 151
0
votes
1
answer
217
views
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 ...
2
votes
1
answer
778
views
Can I add a 120v circuit to my 240v hot tub disconnect box?
I have a load box that feeds power to my hot tub -240 50amp. There are no additional slots to add breakers.
Wondering what your experts suggest to be the best solution to keep the hot tub feed and add ...
- 23
0
votes
1
answer
317
views
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 ...
- 1
0
votes
1
answer
99
views
120 volt wire loses voltage randomly
I recently ran a wire on a known 15 amp breaker to an outdoor GFCI outlet. Have 120 volt at the tie in, 120 volt at the outlet, all good. Then last night I lost all power at the outlet, now shows ...
- 1
0
votes
1
answer
113
views
Split 240V Generator powering 2x GFCI 120V receptacles
Standalone application
I have a 4 wire 240V Generator going to a 2pole 120/240V rated breaker,
One pole feeds Line side Hot of #1 GFCI
Other pole feeds Line side Hot of #2 GFCI
The wiring between ...
1
vote
1
answer
138
views
240 to thermostat for electric heat reading 120v and 70v
I had an electrician in to replace some thermostats a few months ago. One of the thermostats that was replaced was an older analog dial type. The electrician replaced it with a digital thermostat ...
- 11
4
votes
4
answers
1k
views
Is a 120V/208V MWBC good enough for 240V loads?
As detailed in a previous post, I was planning to use the dryer circuit in my condo as a MWBC. A 120V/20A outlet between one of the two hot conductors and neutral would power my small washer and dryer ...
- 435
2
votes
1
answer
506
views
"Lending" the ground wire of a 120V/15A circuit to a 240V/30A circuit
I have read in a previous forum post
Is it OK to borrow a ground wire from a different circuit?
that NEC in article 250.130(C)(4) allows the grounding of an ungrounded circuit by connecting to
an ...
- 435
0
votes
1
answer
1k
views
Change 110 outlet to 220
I’d like to move my clothes dryer. It requires a 220 plug. I used to have a whirlpool bathtub that was on its own 110 outlet. Can I convert the existing 110 outlet to a 220 outlet with needing to ...
- 21
0
votes
1
answer
219
views
Can you wire a regular 120/125v recepticle with two hots? [closed]
I have some LED Grow lights that can take 120/240/277 volt of power. The power cord is a a regular 125v plug w/ ground. My question is can I wire a regular 125v recepticle with two hots (1 on brass ...
- 1
0
votes
3
answers
550
views
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 ...
- 1
1
vote
2
answers
2k
views
2 Pole 20amp Breaker used to power 120v circuit?
In my panel I found a 2 pole 20amp breaker connected to 12/3. When I trace this circuit, it begins to power outlets in my dining room.
At outlet 1, the 12/3 comes in with the Red leg powering the ...
- 11
2
votes
1
answer
607
views
Wiring for switched NEMA 6-20R and 5-20R in same box in garage
My goal is to have 20A receptacles in a particular spot in my garage dedicated to power tools (such as saws) whose motors can be configured for either 240V or 120V, with a switch as a handy second ...
- 397
1
vote
2
answers
381
views
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 ...
- 127
9
votes
3
answers
2k
views
Can you use a 2 pole 2-slot wide breaker to provide 240V?
Forgive my ignorance in terminology, I am a computer engineer but not an electrician. The concepts make sense to me, but I don't know all the industry standards and jargon.
I recently had a 240V ...
- 383
9
votes
6
answers
5k
views
Can I safely plug a 15A 100V appliance into a 20A 250V wall outlet?
I have a convection microwave oven that has a normal 15A 100V plug. I can only conveniently access a 20A 250V outlet, which looks like this: (I am located in Taiwan).
Are there any safety issues ...
- 201
1
vote
3
answers
492
views
Can I get 120 from a leg of 240 in this setup
Similar questions have been asked but not exactly.
This is a 240V fuse box that the air conditioner installers recently put in. It has 2 legs of 120 and a ground wire coming from the junction box.
Is ...
- 11
11
votes
5
answers
6k
views
Why would replacing this 240 V outlet with a 120 V outlet trip my breaker?
I recently replaced a 20 A 250 V single outlet with a 20 A 125 V single outlet so that I could use it for my microwave in the kitchen. The original outlet had two gold screws and a grounding screw. ...
- 119
1
vote
1
answer
389
views
Is it possible to convert this range outlet to L6-20P?
I have this outlet, formerly used for an old kitchen range, currently unused and I am eyeing a device which is described as "208/240V 20A, L6-20P Plug". Is it possible to convert this? Am I ...
- 223
0
votes
2
answers
291
views
Can I use a 3-wire+ground to serve a 240v and a 120v circuit?
When I remodeled my home, in anticipation of replacing an old gas water heater with a new electric heater, I had a 10/3 cable run to the basement utility room. Now the heater has been delivered I ...
- 1
0
votes
2
answers
131
views
Will I have issues in summer with 120v outlets sharing a double pole breaker with my 240v a/c outlet?
I just moved into a 2 bedroom apartment and am planning ahead for summer. While figuring out the breaker box so I don’t put more than one window a/c on a particular circuit I found out all of my 120v ...
- 1
0
votes
2
answers
2k
views
Running both a 120v and 240v extension cord in generator simultaneously
Can I plug both the 120v and 240v extension cords into my champion 9000w generator?
10
votes
8
answers
3k
views
Do travel voltage transformers really not have grounding?
Example 220v-to-110v converter here.
It seems like it accepts a 110V plug with grounding, and yet the converter itself only has a two-pronged plug (to a 240v outlet). Does this mean that plugging a ...
- 749
1
vote
0
answers
119
views
powering a split phase 220v appliance from a single 220v phase
I have a well water pump which works on 220v split phase and have a single phase 220v solar inverter. Can I just connect the hot wire with 220v to either wire and use the other wire as neutral?
- 11
0
votes
2
answers
515
views
120V on a 240V, 30 amp circuit? Brain has zero volts
Facts: old Eaton/Cutler Hammer panel with type BR breaker. Double pole 30 amp breaker, 240V, controls two wall heaters and two zone thermostats in two rooms. Heaters and thermostats and my brain got ...
- 893
0
votes
0
answers
54
views
My dryer on my laundry center stopped working
Can i run my laundry center on 120v for the washer portion only and disconnect the dryer completely? I only have 1 240v outlet and a 120v outlet with a 20 amp breaker. I called a repair shop and they ...
0
votes
0
answers
32
views
240V on all 120v outlets and ceilings lights [duplicate]
In a remote studio have a Sub-Pannel with Multimeter readings.
With No Circuit Breakers In Place
(L1 to N 120v)
(L2 to N 120v)
(L1 to G 120v)
(L2 to G 120v)
(L1 to L2 240v)
(N to G 0v)
slim type ...
4
votes
3
answers
1k
views
Electrical Wiring - New Circuits (Added pics)
I have run two 12/2 Romex “Home Runs” to a junction box, each for 120V to Circuits A and B.
T-off at the junction box, two 12/2 Romex lines split to one 2-gang box, and two more 12/2 Romex lines split ...
- 169
5
votes
2
answers
2k
views
In a multiwire branch circuit, can the two hots be connected to the same phase?
This may be an obvious question, but I haven't been able to find a direct answer.
I believe I have a MWBC - I have two hot wires connected to two separate circuit breakers, sharing a neutral and ...
- 51
0
votes
1
answer
648
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 ...
- 1
1
vote
1
answer
515
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
vote
0
answers
200
views
30V on 120 circuit - swapped dishwashers and circuit dropped to 30V [closed]
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, ...
- 11