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What does circuit breaker description ''WM'' mean?

We are attempting to label circuit breakers in our home. One is currently labeled ''WM''. It's not the washer. What might it be? Thanks.

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Turn on everything that you can then turn off the breaker. Whatever turns off, that's what it goes to :)

Posted on Aug 26, 2009

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What electric circuit brakers are compatable with each other


It is an electrical code violation to install any circuit breaker into a panel for which it is not designed - regardless if "it fits" or not.

The label on the inside cover of the panel will provide a complete list of circuit breakers that are approved for use and maintains the panel's UL listing. Installing any circuit breaker that does not appear on this list will result in loss of the UL listing and if a fire were to develop, your insurance company may balk at paying a claim.

This is not a game - install ONLY those circuit breakers listed on the label for use in the panel.

Sep 30, 2014 | Electrical Supplies

1 Answer

No lights upstaires circuit breaker keeps tripping


Jan 2013
1) Move wire to another same-size circuit breaker to eliminate bad circuit breaker as suspect.
Do NOT increase size of breaker or it will cause fire.
http://waterheatertimer.org/How-to-replace-circuit-breaker.html
http://waterheatertimer.org/Troubleshoot-household-electricity.html

2) Put hand on each appliance and outlet to see which ones are warm. Outlet should never be warm or hot. Replace outlet. Inspect wires for loose and burned connections.

3) If the breaker is good, then add up total watts being used by checking watt rating on each device. 100 watt light bulb is 100 watts. Big screen TV has a label that shows 300 to 500 watts. Computer has label. Space heater has label showing 1500 watts. Iron has a watt rating label. Take total watts and divide by 110Volts and this will give amp load. Total watts used = 2000 and then divide 2000 by 110 volts = 18.8 amps
Compare amp load with circuit breaker.
20 amp circuit breaker has 80% safe maximum, or 16 amps.
If amp load is 18.8 amps, then 20 amp breaker is starting to get hot, and weak breaker will start tripping.
If amp load is 18.8 amps, and breaker is 15 amps, then you are overloaded and breaker is feeling the heat, and tripping because of heat.
Solution is to reduce amp load.

4) If you have short circuit, that can also trip breaker.
Unplug everything and then plug things back in slowly to see which plug or appliance is causing the problem.

Jan 18, 2013 | Electrical Supplies

1 Answer

How do i know when 220 circuit breakers are bad


Always match breaker and wire size:
http://waterheatertimer.org/Color-codewire.html
http://waterheatertimer.org/How-to-replace-circuit-breaker.html

Feel if breaker is getting warm.
Listen for crackling sound.
Breaker is tripping.
Move wires to another same-size circuit breaker and see if problem continues.

Check watt or amp load on breaker.
For example water heater label shows 4500 watt non-simultaneous.
4500 watts divided by 240 volts = 18.75 amps.
You might think 20 amp breaker was good in this case.
However electricians use 80% safe maximum.
20 amp breaker x 80% safe max = 16 amps.
Water heater is 18.75 amps, so install 30 amp breaker.
30 amp breaker uses 10 gauge wire.
This means wire to breaker will run cool and not get hot, so breaker lasts longer, and there is more efficiency.
Using 80% safe maximum rule protects home, reduces heat wear on breakers and breaker box so everything lasts longer.

Nov 18, 2012 | Dryers

1 Answer

Chaf vs braf breakers


Hi Will,

I am an electrician and can help you with this problem.

The panel should have a label that provides the catalog number of the panel. Many labels also detail all the breaker types that the panel has been tested with by UL, FM or other recognized testing laboratory. It is a violation of the electrical code to install any breaker into a panel that it was not designed to accept - even it it fits or can be "made" to fit. This means if it is not listed as an acceptable breaker, it must not be introduced to the panel.

The BR20 AF and CH20 AF are both "Combination Arc Fault Circuit Breakers". This means either device is capable of interrupting current flow when either: (1) an over-current condition exists, or (2) when an arc fault is detected regardless of load.

The fronts look very different:


11_15_2012_2_26_33_am.jpg
The BR20 AF circuit breaker above.


11_15_2012_2_27_14_am.jpg
The CH20 AF circuit breaker above.

These breakers are NOT interchangeable. The CH series has fully exposed clips to engage the relatively flat (or flush) powered buss bar of the panel, while the BR series has a slot in the body that accepts a thin (blade-like), raised powered buss tab of a completely different style panel.

You should replace the breaker only with a like type, arc fault breaker. A similar looking, ground fault breaker is NOT a replacement for this breaker.

I hope this helps and good luck!

Oct 31, 2012 | Electrical Supplies

1 Answer

1 question can Cutler Hammer breakers have the amperage feed through the breakers. To the breaker box and from the box grid to the load. Does it matter which way the amperage is fed through the breaker?...


There seem to be several questions mingled in with those 2 questions.

1) Amps can go either way

2) Breakers trip when heat exceeds certain level. Heat is caused by amps.

3) You want to add a subpanel in garage.
I do not know the code in your area for installing a subpanel.
Your plan will work by connecting 6 gauge wire to main breaker, and new 60 amp breaker will protect wires between main box and subpanel.
Remember, wires going into main breaker cannot be turned off without pulling meter.
Some areas require license to pull meter.
http://waterheatertimer.org/How-to-replace-circuit-breaker.html

4) To work around license and meter-pull, simply replace a 240V breaker in main panel with your new 60 amp breaker.
Then move breakers around to match new set-up.
New subpanel can accommodate two new 240V breakers and one new 120 Breaker
http://waterheatertimer.org/How-to-install-a-subpanel.html

5) 6 gauge wire is correct for 60 amp breaker.

6) I'm not sure what you mean by the box rails?

7) Do you need more amperage on main service?
This means adding a larger service panel with 150 Watt or 200 Watt main breaker.
Some areas require service upgrade when remodeling or adding circuits.

8) How to figure total amp draw at your house.
Add up total watts being used.
For example you have 1/2 Hp motor
754 watts per Hp
1/2 Hp = 377Watts
Volts x Amps = Watts
Amps = Watts divided by Volts.
377 Watts divided by 240Volts = 1.57 amps (plus a bit more amperage when motor starts)
40 watt light bulb divided by 120Volts = .33 amps
Double oven has label located inside door that shows upper and lower wattage.
Dishwasher, dryer, big screen TV, satellite receiver all have labels that show wattage.
Water heater has label that shows wattage of each element.
http://waterheatertimer.org/Figure-Volts-Amps-Watts-for-water-heater.html
http://waterheatertimer.org/See-inside-main-breaker-box.html

Add a comment for more help

Feb 18, 2011 | Cutler Hammer 100 Amp Main Breaker...

1 Answer

Is bryant breakers ok in a murray box


Look on the label inside the door on the circuit breaker panel. It should list part numbers for acceptable breaker. The key is the part number. Bryant is now owned by Westinghouse. Murry is now owned by Siemens. While many breakers will fit in other brand panels, they are only code compliant if they are listed for that panel in which they are installed. Since names have changed go by the breaker numbers. If the breaker number you have is listed on the label then it would be ok. Breakers aren't that expensive, if you have doubt, go to your supply house that carries Siemens and buy breakers listed for your panel.

Jul 11, 2010 | Bryant /murray Bj2200 Main Circuit Breaker...

1 Answer

WIRING DIAGRAM FOR HOUSE


I think you mean a grund fault interrupter type breaker or receptacle.

The ground fault breakers fit into a regular box and they snap over the HOT input power tab like miost breakers AND they have a white pigtail wire that connects to the neutral bar in the panel.

The branch circuit that is fed from this breaker has BOTH the hot and the neutral connecting to the breaker as the breaker has two terminals for the purpose. The grounding wire of the branch circuit still goes to tthe ground bar in the panel.

For a GFCI receptacle, the branch circuit feeds the terminals labeled "LINE" and if other receptacles are to be protected by this device, they have their circuits continued from the terminals on the receptacle labeled "{OAD".

Mar 03, 2010 | Aiwa Televison & Video

1 Answer

I am trying to distinguish whether a fuse panel in a home is 60 amo or 100 amp. It is not labeled on the main breaker?


Hi RC,

Yes, it should be the main breaker controlling all the rest collectively. It should also be written on the door of the panel by the electician that diod the install.

Best regards
Mike

Dec 19, 2009 | Federal Industries 15 Amp Federal Pacific...

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Which fuse on the fuse panel is the one for the power windows i lost the manual


I know thta, for a 2002 Ford Explorer, the 30 amp circuit breaker in location #62 of the power distribution box in the engine compartment is the power window circuit breaker. (unfortunately in the 2002 owner's manuals it is labelled accessory delay ) later years are labelled as the power window circuit breaker.

Hope helped with this. Remember rated this help, good luck.

Nov 24, 2009 | 2003 Ford Explorer

1 Answer

We're attempting to label circuit breakers in our home. One is currently labeled "WM" and it's not the washing machine. What might it be?


Hello

It could have been the washer at one time but the breakers got moved around over time. The washer should be on its own 20amp circuit. What size is the breaker? 20amp? 15amp? It is on the tip of the switch of the breaker. If it's a 20amp it should be for the kitchen or dining room outlets. It could also be for an air conditioner in the window. If it's a 15amp then it could be for lighting or other outlets other than the kitchen, dining room or ac outlet for window ac. That's just the basics. How old is the house? I've seen some really mixed up wiring in older houses. You could also buy a "Sperry" circiut breaker finder for about $50. It has a outlet plug that connects to an outlet and another handheld scanner that you scan the breakers with to find the correct breaker so that you can label it.

John

Aug 01, 2009 | LG WM-1832C Front Load Washer

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