Question

You are to connect as many 130 w fluorescent lumineers as possible to a 20 amp 277 v circuit. if these lumineers are operated continuously, the breaker can only carry 80% of its rating. for this 20 amp breaker this is 20 amp times 80% equals 16 k how many luminaires operate continuously can be connected to the circuit ?

Answer 1

A total of 34 fluorescent luminaires, each consuming 130 W, can operate continuously on a 20 amp, 277 V circuit that is continuously run at a maximum of 80% capacity.

Step-by-step explanation:

To determine how many 130 W fluorescent luminaires can be connected to a 20 amp, 277 V circuit that operates continuously at a maximum of 80% capacity, we first need to calculate the maximum power that can be drawn from the circuit:

• Maximum current = 20 amps × 80% = 16 amps
• Maximum power (P) = Voltage (V) × Current (I) = 277 V × 16 A = 4432 watts (W)

Given that each luminaire consumes 130 W, we then divide the maximum power by the power consumption per luminaire:

• Number of luminaires = Maximum power / Power per luminaire = 4432 W / 130 W ≈ 34 luminaires

Therefore, 34 fluorescent luminaires can operate continuously on this circuit without exceeding the safety limit.