![]() ![]() For example, whether breakers 1 and 2 both use line 1 will depend on the manufacturer. ![]() Note that lines 1 and 2 may not always be the same for an electrical panel's left and right columns. Here's an example electrical panel layout: Line Because 120 V breakers only need to connect to either line 1 or line 2, but not both, they take up a single row of an electrical panel's left or right column. Larger appliances need 240 V, so those circuit breakers connect to line 1 and line 2.Įach row in an electrical panel alternates between line 1 and line 2. Lights and outlets in rooms need 120 V, so circuit breakers for those rooms connect to neutral and either line 1 or line 2. Circuit breakers limit the current from exceeding the desired threshold to ensure that your wires don't melt. There are 240 V between line 1 and line 2.Ĭircuit breakers are labeled for various rooms or appliances on your electrical panel. There are 120 V between line 1 and neutral and between line 2 and neutral. Three lines run from the power company's transformer (the thing that looks like a can on a power pole) to your home: a neutral and two hot leads (line 1, line 2). ![]() First, let's discuss how home electrical panels are wired in North America. ![]()
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