"PROFESSIONAL INSTALLATION IS REQUIRED" Brand New 5HP Single Phase Magnetic Motor Starter. Complete With Adjustable Overload Relay The Range Is Between 22-34 Amps. Also Comes With Built In Side Mounted Auxiliary Contacts. Normally Open & Normally Closed Type. Starter Comes Complete In A Metal NEMA 1 Style Enclosure, In Addition To 4 Punch Outs For Incoming And Outgoing Wires. Manufacturer Has Supplied 3 Rubber Grommets For Wire Protection. Reset Button Located On The Overload. Reset Can Be Set To Manual Or Auto Reset. HP: 5/ Voltage: 208-230vac/ Amps: 34 Amp/ Contactor Phase: Single/ Enclosure: Metal NEMA 1 Enclosure/ Dimensions: 9.5" Tall 5.5" Wide 5.25" Depth/ Overload: Amperage 22-34 Amps. If you currently have a 5 HP air compressor and the contacts on your pressure switch keep burning up, a starter is what is needed to fix the problem. If you are using this starter on an air compressor, you will also need a pressure switch to control the starter. In this application the pressure switch controls the On and Off of the starter according to the pressure setting of the pressure switch. Due to this being an electrical item that can be installed incorrectly there is no warranty on this item after installation.