The Intermatic Surge Protector is designed to protect your pool and spa equipment such as Pumps, Variable Speed Pumps, Heat Pumps, Motors Resi-well Pumps etc. and other electronic equipment that can be easily wiped out with power surges. Features: Great for protecting Pumps, Variable Speed Pumps and Heat Pumps 120/240 VAC Single Split Phase SPD for use on a variety of Pool Spa Equipment Type 4X Enclosure All Intermatic Surge Protective devices utilize state-of-the-art TPMOV surge technology Meets all UL1449 3rd Edition Standards Green LED Protection Indicator Only Pool Spa Surge Protector that is both Type 1 and Type 2 compatible 3 modes of surge protection (L1-N, L2-N, L1-L2) 18" 10 Gauge Leads 1/2" x 20 Threaded Nipple (weatherproof and UV resistant)