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What size breaker goes into the unit - Electrical Supplies

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It depends on what you are talking about,if you need a circuit breaker in the transfer switch,then you cant go over what the amperage of the generator is,if you need circuit breakers for the outlets on the generator,that also varies depending on your generator,if you would of given all the info that we need,i wouldnt have to give you this kind of answer,it couldve been more concise,make,model,s/n of generator,s/n of transfer switch etc.

Posted on Apr 16, 2015

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1 Answer

Unit runs for hours then power goes away, breaker not tripped


Possibly a backed up drain, possibly loose/melted high voltage wires just not tripping breaker, possibly wrong size breaker

May 29, 2017 | Heating & Cooling

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Ac wont start kicks breaker why.


Either the breaker rating is too small for the air conditioner or the unit is defective. Choose the right size breaker for the air conditioner power requirements and ensure the wire size to the unit is correct.

May 26, 2014 | Electrical Supplies

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What size wire and how does it hook to thr unit rpkb-036jaz


Look at rating plate on side of unit for Volts, Amps, Watts.
Volts x amps = watts.
If unit is 240Volts, then you need double-pole 240Volt breaker
If unit is 8500 watts at max power, then 8500 watts divided by 240Volts = 35 amps.

What size breaker for 35 amps?
When electricians figure load rating for breakers, they use the 80% rule.
40 amp breaker x 80% = 32 amp safe maximum load for 40 amp breaker. Use 8 gauge wire with 40 amp breaker.
50 amp breaker x 80% = 40 amp safe maximum for 50 amp breaker. I use 6 gauge wire with 50 amp breaker.
60 amp breaker x 80% = 48 amp safe maximum for 60 amp breaker. Again, use 6 gauge wire with 60 amp breaker.

How to connect wires to unit.
First of all, all outdoor HVAC units require power cut off located next to unit.
This lets the mechanic, or service tech turn power off to work on unit, even if the mechanic does not have access to main breaker box.

Next, open unit to see where wires connect.
If unit has wires, then connect both hot wires from 240 breaker to the wires inside unit. Connect bare ground wire to green ground screw.
If unit has terminals. The terminals will be labeled L1 L2. Connect each hot wire from 240Volt breaker to either one of the screw terminals. Then bare ground goes to green ground screw.

Copy following links for basic illustrations connecting wires to terminals, and to breakers, and selecting wire size.
http://waterheatertimer.org/How-to-wire-Tankless-electric-water-heater.html

Jul 21, 2012 | Rheem R-410A Complete Split System Heat...

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Please advise wire and breaker size for this unit. Thanks Doug


On any piece of equipment look for the model number tag and check for something that looks like M.C.A. and/or M.O.C.P. (with or without the .'s after the letters) The MCA is minimum circuit amps which indicates the minimum wire size and therefore minimum breaker size as well. The MOCP is maximum over current device. This is the Maximum fuse or breaker size recommended for the unit. However, both numbers are more importantly linked to the wire size feeding the unit. You must be certain that the wire size is large enough to provide proper voltage without overheating and not put too large a fuse or breaker for the wire size. A good electrician or an electrical chart for wire sizing is very important.

Dec 11, 2010 | Heating & Cooling

1 Answer

Do you hhave a wireing picture or plan to wire the load center


Here are links that show basic wiring inside a breaker box.

Please look at the images.
If you need more help, answer back and we'll go to the next step

http://waterheatertimer.org/See-inside-main-breaker-box.html

http://waterheatertimer.org/240-v-water-heater-circuit.html
http://waterheatertimer.org/Circuit-breakers.html
http://waterheatertimer.org/Color-codewire2.html
http://waterheatertimer.org/Figure-Volts-Amps-Watts-for-water-heater.html

Breaker size:
15 amp breaker connects to 14 gauge wire
20 amp breaker connects to 12 gauge wire
30 amp breaker connects to 10 gauge wire
Home Depot and Lowes have a breaker and wire size size chart next to wire cutting machine
These stores have guys who know the basic breaker size for your big appliances
Each appliance has a name plate showing wattage and voltage.
The wattage tells you what size wire.
The voltage tells you what size breaker and whether you need a 120V breaker or 240V breaker.

To lay out your home wiring:
The kitchen microwave needs a 20Amp 120V 'dedicated' line that goes just to the microwave.
The rest of the kitchen plugs are served by another 20 amp 120V breaker
When laying out rest of house, figure how much wattage might be used in an area.
For example the den might have a big 500Watt TV, and 2 ceiling fans and 4 lights.
Add up the wattage and decide how many plugs and switches you want on each breaker.
Now let's say you have a 20Amp breaker which can carry 1920 Watts for the den.
Inside the breaker box you have a 12 gauge wire for the 20 Amp breaker.
The 12 gauge wire has a black, white and bare ground.
The black connects to breaker. The white and ground connect to Neutral busbar.
The 12 gauge wire leaves the breaker box and goes to the first box in the den.
This box is your junction box.
The junction box can be a switch box or a ceiling light box.
You cannot have any junction boxes that are covered by drywall.
Junction boxes must be accessible. All boxes must be accessible.
For example, you choose a ceiling box for your junction box.
The junction box is also the same box your ceiling light connect to.
From your junction box, you branch off a wire that goes to next box.
And then a wire branches off next box and goes to next box. And so on.

If you need more help, answer back and we can help.

Oct 24, 2010 | Gb Electrical 100 Amp GE Load Center

1 Answer

15A breaker tripping; Is this the right size breaker for the unit?


The breaker is sized according to the size of the wire used in the circuit. The breakers task is to protect the wire from an over current.
The allowed sizes are
#14 wire .... 15 amp breaker
#12 wire ..... 20 amp breaker
#10 wire .. 30 amp breaker
To check if the oven and circuit are compatable .. run an extension for the oven to an outlet outside the kitchen and see if it holds.

Please Vote !!

Mar 08, 2010 | Hotpoint RVM1435 Microwave Oven

1 Answer

Heat / Cool unit runs approx 45 minutes then trips the breaker


Check the amperage of the breaker or change the breaker out completely with a new one. The tripping problem is that the breaker itself is heating up to the point that the bi-metal in the breaker (safety device) is throwing the breaker off. This could be the problem for you however, I would get an ampherage draw from the unit to insure that the breaker is the proper size for the unit. If you can find what kilowatt the unit is divide that number by the amount of current being supplied and that will give you the breaker size.

Good luck hope I helped you some

Dave

Jan 08, 2010 | Kenmore Heating & Cooling

1 Answer

Unit comes on and runs for 5 minutes, the circuit trips off


30 is the correct size breaker for this unit. It sounds like there is a grounding issue going on in the system. Or off of the Thermostat. Something is grounding out causing the switch to trip. Are you running #10 wire to breaker and the unit? If not you will need to increase your wire size

Jan 03, 2010 | Dayton D-F79 Electric Space Heater- the...

1 Answer

What size breaker do i use?


at 10kw, that should be about 34130 btu's. With 240 volts, you should be using approximately 41-42 amps. Check the manufacturers name plate for breaker sizing. probably a 45-50 amp double pole breaker will work, also check with a licensed electrician to make sure that the wire is sized correctly for that unit. Hope this helps.

May 01, 2009 | Fahrenheat Electric Convector Baseboard...

1 Answer

Mr slim unit


Let me try to send you to a quick fast electrical course on wiring size vrs amp draw it can carry before it burns into. The breaker box can send out the rated amps the wire comming into the box its sized for. (example. #3 can carry 10 amps) then it is distributed thru breaker thru the wires to the loads amp draw. depends on the maxium rated amp draw of the load, the wire can carry a certain amount of heat or amps. Ceck the max. rated amps or heat draw it can carry to size your wires & breaker,! thank you very much!

Dec 11, 2008 | Heating & Cooling

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