Question about General Electric 100Amp 3-pole circuit breaker

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Why does my 100 amp main get so hot the black wire is starting to melt, should'nt the breaker trip if there is that much draw?

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1 Answer

You need an electrician before there is a fire.
If the breaker is not tripping, then the breaker is bad.

Act now before the heat damages the box and you need full replacement.
Absolutely put the metal cover back over the breaker box and keep the door closed.
Move all flammables away fro breaker box area.
Put a smoke detector right there.
Put a fire extinguisher nearby.
You don't put water on an electrical fire.

Before the electrician gets there, turn off as many electrical devices as you can.
Don't run all at one time.
Run just when needed.
Electric water heater.
Space heaters.
Vent fans.
Electric Stove.
Electric Oven.
Microwave.
Heat AC.
Electric Dryer.
Washing machine.
Power tools.
Big screen TV.
The outdoor lights, and swimming pool pump.
Turn off as many indoor lights as possible.

Now the freezers and refrigerator have to stay on.
Clean out the grilles so they run more efficiently.

Reducing your power consumption will be good practice.
When you call the electrician, tell him the brand and amperage of your main breaker.

If the whole box needs replacement, you might want to upgrade the service to 150Amp.
Some areas, it's code that old panels have to be upgraded to more amperage ... but the electrician will know the details. Call local electric supply house to double-check what the electrician tells you.

Posted on Nov 09, 2010

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1 Answer

Outside main 100 amp breaker is tripping but none of the inside breakers, supposedly when dryer and tv on together but not all the time


Am I to assume your dryer is electrical? If so, I'll guarentee it will draw MORE than 14 Amps if heating. Sorry, can't analyze your problem from here.

May 01, 2014 | Cutler Hammer 100 Amp Main Breaker...

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How can u tell if the breaker is the problem ,it seems like the breaker still clicks in and out with some resistance and has stays clicked in


Best way would be to clamp an amp-meter on and check draw at time of tripping. If it's been tripping often, that will tend to weaken it. Testing incoming voltage as well to be sure voltage is good is wise as well. If you have low voltage to begin with, that will cause higher amp draw on all circuits.

May 22, 2011 | Your One Source 100 Amp Main Breaker

1 Answer

Powerstar 115 tankless tripping reset ontop of #2 heat chamber #1 does not get overly warm mainly because of incoming water temp. but #2 seems to be heating after water flow stops to hot to touch and...


I don't have specific suggestion for tankless tripping breaker or if that is a circuit breaker problem or a tankless problem.

1) Move wires to another same-size breaker and see if problem persists.

2) Compare amp draw on tankless label with wire size and breaker size amp rating.
For example 30 amp breaker using 10ga wire is rated for 80% of listed amps or 24 amps.

3) If you are drawing full 30 amps, then 30 amp breaker is getting hot. Breaker trips with heat. Older breakers can trip more easily.
http://waterheatertimer.org/How-to-replace-circuit-breaker.html

4) Before calling service technician, open following link for Bosch troubleshooting steps.
http://waterheatertimer.org/Troubleshoot-Bosch-Tankless-water-heater.html

5) Be sure to read manual for yearly maintenance requirements.

6) Add a tempering tank for incoming cold water problem.
http://waterheatertimer.org/Tempering-tank.html

7) All gas tankless brands can be repaired by homeowner for $330.
http://waterheatertimer.org/How-to-install-gas-water-heater.html

Apr 22, 2011 | Bosch PowerStar AE115 Tankless Water...

1 Answer

My unit is tripping the main breaker what should i look at first


With this cold weather, -- it is not likely tripping off because it is too hot!

Are you familiar with the history of this unit?-- Like has it tripped in the past during HOT weather?
This might be a clue, that the circuit is really loaded close to its limit--

This leads to the next possibility: That the breaker is getting weak (They do after many hard starting loads!
Now-- If you can get the system to start and run for just a few seconds-- can you put a Clamp around Amp meter on the wires?-- and read the full load current?
How close is this to the rating of the circuit breaker?
Is the breaker, and the wire size marginal?

Another thing to look for, is loose lug screws at the main fuses, and the Main contactors, and the motor leads--- for loose wires result in overheating, which raises the current, and leads to tripping, too.

How long ago was the condenser cleaned-- this leads to high amp draw too.

But the first thing would be to learn more about the age of the Main Breaker, and what the 'normal' run current is for that system.

Mack B

Dec 28, 2010 | Carrier 38CKC036 Air Conditioner

1 Answer

How dou you connect the electical wires I connected them and it throws the breaker


Look at rating plate on motor.
Look for volts, watts, amps.
Figure with Volts x Amps = Watts.
Amps = Watts divided by Volts
1 hp horsepower is 756 Watts.

Lets say you have 120Volt 2hp motor
So 2 horsepower motor draws 1500 Watts
Amps = 1500 Watts divided by 120Volts = 12.5 amps = so you need 120Volt 15 amp breaker with at least 14gauge wire (as long as motor is located within 50 feet of breaker.)
If motor is farther away, then you need 20 amp breaker with 12gauge wire.

Look at circuit breaker rating.
If motor is 240 and breaker is 120, then it will trip breaker.
If motor is 120 and breaker is 240, then it will trip breaker.
If breaker is for 15 amps and motor draws 20 amps then it will trip breaker.

Generally speaking, if motor and breaker are 120V, then black wire goes to black wire; white wire goes to white wire and green wire connects to bare copper wire.
If motor and breaker are 240V, then wire colors can be different. Black-red or Black-white from breaker connect to Black-red or Black-white at motor.

Add a comment. Say the motor rating and color of motor wires. Say the breaker size and color of wires coming from breaker and I will help you wire the device.

Nov 27, 2010 | Northern Industrial Tools Electric Meat...

1 Answer

I have a Rheem Model # 82V52-2 and its being supplied by 25 amp breakers. They do not trip out but the 100 amp main gets real hot and trips out and I believe it happens when the water heater is in use- any...


The Rheem water heater uses 4500 Watt elements
Check label on side of any appliance to see electrical rating details
2 element tank with two 4500 watt elements is still a 4500 watt appliance since both elements are never ON at same time.

Volts x amps = watts
amps = watts divided by volts

amps = 4500 divided by 240Volts or 220Volts
amps = 18.75
Your water heater uses 18.75 amps to 20.45 amps

Your 25 amp breaker should only carry 80% of rated value
25 amps x 80% = 20 amps.

So your water heater breaker is correctly sized.
You should have a 10 gauge wire going to this water heater.
12 gauge wire is a bit undersized for 4500 Watt water heater
Feel the water heater wire to see if it is warm.

If the main breaker is getting hot when 20 additional amps are being used by the water heater.
1) The house is using more amps than your 100 amp main can carry
Using the formula, 100 amps x 80% = 80 amps for the main breaker
Add up your total amp draw.
For example if your 3500 watt oven is ON, it draws 16 amps.
If your 5000 Watt electric heater is on, it draws 23 amps.
Your 1500 Watt 120V microwave draws 12.5 amps.
Add these numbers up plus your water heater, and it comes to 71 amps.
71 amps is getting close to the max 80 amp, but it's not over.
Now if you have a pool pump and and hot tub and a table saw going, the main breaker could be overdrawn.

2) To solve the problem short-term, you can put a timer on the water heater and use it only when needed.
http://waterheatertimer.org/Compare-13-electric-water-heater-timers.html

3) The main breaker is bad and needs to be replaced.

If you need help figuring circuits or timers, add a comment and I will help

Nov 05, 2010 | Rheem Water Heaters

2 Answers

How do I run from a 100 amp main panel to a 60 amp subpanel, 125 from my house to the garage


See 60 Amp sub-panel image

Above image shows drawing of 60Amp sub-panel located next to main panel. Drawing shows #6 wire... 125' distance to garage calls for #4 wire. I ran #4 to my barn and have no problems.

Give thought to how many new breakers you want at garage.
See photo of subpanel that holds three 240V breakers

Using drawing as a guide. Replace existing 240Volt breaker with new 60 Amp breaker. Two hot wires connect to new 60 Amp breaker. Neutral connects to neutral busbar.

More space: You can free up space in main breaker box using a tandem breaker. Or by doubling up 2 lightly used 120V circuits onto one breaker. Do not double-up on 240 Breakers

Conduit: You want PVC conduit large enough to fit three #4 wires. Bigger conduit is easier to pull wires ... and maybe later ethernet wire, or alarm wire etc.

Ground wire: You can put a ground rod at garage and run #6 bare copper between sub-panel neutral-busbar and ground rod. Attach ground wire firmly with grounding clamp.

I want you to check with local electrical supply for exact code in your area concerning conduit requirements, grounding, and wire size. Tighten all lugs very tight against wire.

Oct 03, 2010 | Siemens 100 Amp Main Breaker Renovation...

1 Answer

Can tree limbs touching/rubbing against the wires coming from the utility pole cause the 100 Amp Main circuit breaker to trip????


yes,if it has worn the insulation through on one or more of the hot phase conductors to the neutral phase wire,but also check the neutral busbar in the breaker panel for a high resistance connection as this will also trip the main breaker

Jun 06, 2010 | Gb Electrical 100 Amp GE Load Center

1 Answer

I've changed out my central heat and air ,with a larger unit , after 5 weeks working fine ,now if my air conditioner ,hot water tank and stove is on along with a few minor appliances my main breaker trips...


No,you can not wire directly to a meter. All wiring must come through the circuit panel or sub panel.
150 amps is sufficient to run what you describe. You may have a weak main breaker or loose wiring to these appliances. Place a amp meter on a incoming supply wire at the main, while you monitor amp draw have someone go around the house and turn on all these appliances. If it trips at less than 140 amps you have a bad main.
I suspect you will find a bad neutral wire on one of these appliances.

Sep 30, 2009 | Goodman Heating & Cooling

1 Answer

The breaker is getting hot and then tripping. There were some loose wires that were tightened but it is still tripping. The breaker is brand new. It is a main panel breaker on a utility vessel.


Loose connection does cause heat, and the heat may have damaged the breaker. You must use an ammeter to check the amperage drawn on the circuit. If the amperage is well below the breaker rating, then replace the breaker

Aug 14, 2009 | Your One Source 100 Amp Main Breaker

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