A 316 m2 (3400 ft2) house has the following loads: 1.5 kVA compactor, 120 V; 1.2 kVA

Question:

A 316 m2 (3400 ft2) house has the following loads: 1.5 kVA compactor, 120 V; 1.2 kVA ceiling fan, 120 V; 14 kVA range, 240 V; 30 kVA heating unit, 240 V; 40 A air conditioning unit, 240 V; and 10 kVA water heater, 240 V.

(a) Using the standard method, size the THW service entrance conductors.

(b) Determine the minimum number of 15 A circuits for general lighting and receptacles.

Estimate the total number of circuits required for the entire house.

(c) Size the main breaker and the grounding conductor.

(d) Size the circuit breaker for the heating unit and the A/C unit.

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Ali Khawaja

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