How do I connect the input power for a 115 VAC model of Millermatic 135?

Connect to an individual branch circuit with a protected time-delay fuse or breaker, and ensure it is rated at least 20 amperes. Use an extension cord of 14 AWG up to 50 ft (15 m) or 12 AWG for 50 up to 200 ft (61 m). Special installations may be needed near gasoline or volatile liquids (Page 23-24).