What are the electricity requirements for my washer/dryer?
A three-wire single-phase 120-volt AC-only electrical supply of either a 15-ampere or 20-ampere fused circuit is required. A time-delay fuse or circuit breaker is recommended, and it should be plugged into a grounded 3-prong outlet.
From the official Whirlpool Thin Twin manual, page 3
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