On an electrical panel schedule, Circuit 12 shows '20A/1P/GFCI - Kitchen Outlets'. What does '1P' indicate?
Correct Answer
C) Single pole breaker
In electrical panel schedules, '1P' indicates a single pole breaker. This means the circuit uses one pole of the electrical panel and serves 120V loads.
Why This Is the Correct Answer
In electrical panel schedules, '1P' specifically indicates a single pole breaker. Single pole breakers occupy one slot in the electrical panel and are designed to handle 120V circuits. They have one hot wire connection and are commonly used for standard household circuits like outlets, lighting, and small appliances. This notation is standard electrical terminology used by electricians and contractors when reading panel schedules and electrical drawings.
Why the Other Options Are Wrong
Option A: One phase power
While single pole breakers do connect to one phase of the electrical system, '1P' specifically refers to the breaker type, not the power configuration. The notation describes the physical breaker characteristics rather than the electrical phase relationship.
Option B: Protected circuit
The 'P' in '1P' does not stand for 'protected.' Circuit protection is indicated by other markings such as 'GFCI' (which is separately shown in this example) or 'AFCI.' The 'P' specifically refers to 'pole' in breaker terminology.
Option D: Primary circuit
Primary circuit is not indicated by '1P' notation. Primary circuits typically refer to main electrical distribution systems or transformer primary windings. The '1P' designation is specifically about the breaker configuration, not the circuit hierarchy or importance.
Memory Technique
Remember '1P = 1 Pole' - think of a single fishing pole catching one wire. Single pole breakers have one connection point, just like one pole has one hook.
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