Chapter 4, Problem 15RQ

The local utility company must provide service to a small business.

The business is a wood working shop. What is the minimum standard size transformer that can be used to provide the following loads? The service is 240 volts single phase.

2—Table saws rated at 12 amperes each.

2—Drill presses rated at 4.5 amperes each.

2—Drill presses rated at 6.8 amperes each.

1—Air compressor rated at 24 amperes.

2—Commercial routing machines rated at 10.6 amperes each.

General lighting load rated at 4 kW.

Air conditioning load rated at 12 kW.

Gas heat with a blower motor rated at 10.2 amperes.

(Note: The smaller of the heating or air conditioning load may be omitted because both do not operate at the same time.)