Gauge simply refers to the size and diameter of the wire within the cord. Most 16 guage, 3 prongs are rated for 3.6 amps and 1600 - 1875 watts. It it were me, I'd sleep better at night with a 14 gauge. I use a 12 gauge for my 1000k + 216 watts in T5s, pumps, fans, etc. with a 20 amp breaker...