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As wiring through a sub panel involves pulling more wire than direct wiring there is a tiny loss of power due to the additional wiring footage due to simple resistance of the conducting material (usually copper, sometimes aluminum). In and of itself, a sub-panel does not cause a loss of power. It is merely a convenience for operators to switch off circuits on a selective basis for maintanance without having to go to the center or having to call someone in Maintanance to switch off a circuit. For example in a Commercial building there are in the Main Breaker Box several Distribution Breakers which control electricity to each business or tennant. In the individual business or tennancy there are often sub panels which allow the local control of electric distribution. However if too much current is passed through a circuit the wire will heat up and may throw a breaker as resistance increases and a fault occurs. This may be quickly determined by laying a hand on the breakers. If one set is warm to the touch it is close to fault. Very likely the wire is too small.

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No, a subpanel does not take away amp capacity from a main panel. The amp capacity of a panel is determined by the size of the main breaker in the panel, not by the presence of subpanels. Each panel operates independently and draws power from the main panel based on the circuits connected to it.

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Q: Does a sub panel take away amp capacity from a main panel?
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If you have a 123 Watt 7 amp solar panel working on charging a 12 volt 225 amp hour gel battery how long will it take the solar panel to charge the gel batter?

To determine the time it will take to charge the gel battery, you need to consider the energy output of the solar panel and the capacity of the battery. Since the solar panel output is 123W and the battery capacity is 12V and 225Ah, you can calculate the charging time using the formula: Time = (Battery capacity in amp hours) / (Solar panel output in watts). In this case, the time would be 225Ah / 123W = 1.83 hours.


200 amp main and would like to add another 100 amp service in another room how can you do this?

To add another 100 amp service in another room, you would need to install a subpanel. This involves running a new electrical line from the main panel to the new location, installing the subpanel, and connecting the new circuits to it. It's important to ensure that the overall load on the main panel does not exceed its capacity with the addition of the new subpanel. Consulting a licensed electrician is recommended to ensure the work is done safely and up to code.


How many breakers in a 100 amp panel?

As many as there are spaces for. The physical amount of breakers that can be added to a load-center or for that matter an electrical panel is governed by the amount of slots that are available. This holds true no matter what the amp capacity of the unit is. What you don't want to do is, turn on more than 100amp worth of circuits at the same time! In other words if you have 200 circuits all hooked to the same 100amp box, all rated at 10amps each, you can only turn on 10 circuits at the same time without blowing the 100amp circuit breaker.


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Can a 60 amp main breaker be used to supply a 100 amp subpanel power so that I can take advantage of the extra curcits provided by the larger panel I'll only be using 45 amp at any time?

It is not recommended to use a 60 amp main breaker to supply a 100 amp subpanel. This can lead to overloading the main breaker and potentially causing a fire hazard. It's important to match the ampacity of the subpanel to the main breaker for safe and efficient operation.