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What size circuit breaker should be connected to the oberdorfer 406m

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It uses 12.8 amp on 115 volt and 6.4 amps on 230 volt. So you only need a 15 amp or a double 15 if on 230 volts

Posted on Nov 28, 2013

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Intertherm FEH-015HA. Why does it keep opening breaker?


Avery, if the breaker is properly sized, there is something in the circuit that is causing higher than normal resistance such as possibly loose connections on one end or the other. Check the 'minimum circuit ampacity' (for circuit A and possibly circuit B) on the heater tag and make sure the correct size breaker has been installed. That should be a 15 kw furnace and could either be a dual circuit or a single circuit heat strip. Fifteen kw correlates to approximately 60 amps at 240 volts.

TURN OFF THE POWER and check the connections inside the furnace terminal block for discoloration and tightness. If its a dual circuit, there will be two breakers to turn off. Check to see if it is a dual circuit and if so, see if someone has paralleled those two circuits together inside the furnace. If so, you have to make sure the appropriate single circuit wire and single breaker has been installed.

It is usually recommended to run the separate circuits to the furnace instead of paralleling them together.

Good luck and whatever you do...BE SAFE ABOUT IT .

Dec 05, 2015 | Heating & Cooling

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Hi,my belling model 664 wh is tripping out just as it reaches set temp on main oven dial,i have just replaced the main oven element, any solutions I would be grateful. Thank you.


Sounds like the amperage draw of the oven is right at the breaker size. Circuit Breakers should not be loaded more than 80%. Breakers take time to trip when they are close to the limit. IF the problem started with the replacement oven element, it may be the wrong one and could be tripping the breaker by drawing too much power.

Otherwise: Wiring or breaker not sized right, maybe another load on the breaker in addition to the oven, possible bad connections causing extra amperage, or wrong the oven element made for a higher amperage oven. In rare cases the breaker might be bad, but this is not likely.

Someone experienced needs to a) identify the breaker size b) verify the wire connected is appropriated sized c) verify the oven's current requirements and d) look for bad connections.

Normally another load would not be on the oven circuit unless a diy person changed the wiring. With those items verified, a clamp on amp meter would be used to verify actual current draw when the oven is on to ensure the load is appropriate for the breaker, wiring and oven. If at this point the load is less than 80% and the breaker still trips, change the breaker.

May 25, 2014 | Ovens

1 Answer

Wire wont fit in new coleman breakers


Hi - I'm an electrican and would like to help.

If the wire you're trying to install on a circuit breaker doesn't fit - then something is wrong. Typically, circuits are designed around the amount of voltage and current a product requires. The voltage determines the combination of material & thickness of the insulation on the wire and the the amount of current (in amps) determines the size of the conductor or wire. The appropriate circuit protection (fuse or circuit breaker) is selected to protect the circuit from trying to deliver more current than the product requires (in the case of a fault, etc.) which would cause the wire to over heat and potentially cause a fire. So, if the product requires (for simplicity) 120 volts and 20 amps, a wire is selected with the proper insulation for 120 volts or more and conductor sized to carry no less than 20 amps. Aluminum and copper is expensive, so providing larger sizes than needed is a waste of resources and money. A #12 copper wire is suitable for this amount of amps. A circuit breaker rated for 20 amps is chosen. A 20 amp circuit breaker must be able to accept a wire capable of 20 amps - other wise it's not really a 20 amp circuit breaker. Most circuit breakers are designed to accept LARGER wires than needed - because often times circuits will need a wire that is one or two sizes larger due to the length of the circuit (how far the product is from the electrical panel).

If you're seeing a circuit breaker that will not accept the wire, the circuit breaker is probably the wrong size (and if you could force the wire in it - it would probably trip instantly when turned on) or someone has made a very expensive blunder when chosing the wire type and size for the circuit.

If the the latter is the case, simply connect a short length of the correct size wire to the oversized wire in an appropriate connector and secure to the circuit breaker terminal screw. otherwise, have a qualified person evaluate the situation. Be smart. Be safe.

Feb 22, 2013 | Electric Circuit Breaker Kit for Furnace

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

What size circuit breaker circuit breaker


Copy following link to determine correct wire and circuit breaker size:
http://waterheatertimer.org/Color-codewire.html
http://waterheatertimer.org/How-to-replace-circuit-breaker.html

Be sure to match wire size and breaker amp rating so breaker will trip when heat on wire reaches trip point.
Undersized breaker, or undersized wire are fire hazard.
Maximum 12 boxes per circuit breaker.

Nov 23, 2012 | Food Mixers

1 Answer

I need to know fuses box


Copy following link to see basic circuit breaker box.
http://waterheatertimer.org/See-inside-main-breaker-box.html

It appears you are connecting home automation to to breaker box.
Remove one wire from each circuit breaker. Connect this wire to relay. Then run new wire from relay to circuit breaker.
When the relay turns ON, then that will complete circuit to each circuit.
This will work for 240 volt or 120 volt or 277 volt single-phase split phase..

Match wire size and circuit breaker
http://waterheatertimer.org/Color-codewire.html

Nov 22, 2012 | Heating & Cooling

1 Answer

What to do if 30 amp fuse keeps blowing in main breaker box


A 30 amp circuit breaker or fuse is NOT a typical size used for the protection of convenience outlets & general lighting circuits, especially in a residential setting. In fact the National Electrical Code (NEC) prohibits anything larger than a 20 amp breaker to protect a #12 copper wire and and a 15 amp breaker to protect a #14 copper wire. These are the size wires used to supply nearly all outlet and lighting loads in a residence.

It's not clear to me from your question if this 30 amp breaker is a double pole type that is providing power to a second, smaller circuit breaker panel and these outlets are fed from it. This would be in line with what the NEC would allow and what I suspect is the situation. I'm only going to get into this a minimal amount as more information is needed for me to be able talk intelligently about it.

I would shut off the loads that are connected to the 30 amp breaker. If that is a panel, I would shut off all the circuit breakers in it, then turn onn the 30 amp breaker. If it trips, then there is a problem between the 30 amp breaker and the panel. You may have connected line cables to ground or neutral - and vice-versa.

Can you please explain in as much detail as possible what is connected to the 30 amp breaker? Is it a single pole (120 volts) or double pole (240 volts) circuit? What size wires are connect to the breaker terminal(s) What type of cable is connected to it? How many wires are in the cable assembly or pipes? What is the size of wires? If they feeds a second, smaller breaker panel, where do the wires terminate - into lugs on the top or bottom of the panel or terminals of a circuit breaker? What happened or changed to cause this circuit breaker to start tripping? Is this part of a new installation - and if so, was the wiring done by an electrician? Was the work inspected?

Please try to answer as many questions as possible. The more information you can provide will help me get you the best answer.

Jan 19, 2012 | Electric Hammering

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

I have a 2hp compressor motor that keeps tripping the breaker after about 5 minutes of use. i have changed the caps but it keeps popping the starter cap. is the motor just bad?


Our 2 HP Speedaire horizontal tank compressor is rated 115 / 230 volts at 24 / 12 amps, respectively. This means at 115 volts, a 30 amp circuit breaker is the bare minimum. That also means that the wiring should be #10 copper wires for short runs, but the next size up; #8 copper wires would be better connected to a 40 amp circuit breaker. Running at 230 drops the amperage requirement by half, to 12. A #14 copper wire is minimum for short runs with a double pole 15 amp circuit breaker, but #12 copper wires connected to a double pole 20 amp circuit breaker would be better choice.

If the compressor is cord connected (or even directly wired) with the minimum sized wires, it will likely a voltage drop problem unless very close to the panel. This problem is more pronounced as the distance between the circuit breaker and motor increases, or when smaller wires are in the circuit. All the voltage at the circuit breaker does not reach the motor, as it is lost as heat; so the compressor only sees 90 to 105 volts instead of the 115 volts it expects.

If the cords, connections, etc are getting hot, it is a tell tale sign of under-sized wires and /or poor connections. Once you solve these problems, the compressor should run "as advertised " because motors usually don't "go bad" but fail all at once. Unless you have a bearing problem - or there is a problem with the load itself (compressor).

I hope this helped.

Nov 12, 2009 | AO Smith 2 Hp Spl 3450rpm M56 Frame...

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