Standard Battery SwitchFor any vehicle that needs to use two batteries where one battery is used for starting the engine, while the other is used to power auxiliary loads. This is a common situation in trucks, boats, RVs, police and rescue vehicles, and in ambulances or fire equipment. A selector switch allows use of the first battery, the second battery, or both batteries simultaneously. This provides back-up starting power in an emergency.Features:These switches combine the functions of Battery Selector and Master Disconnect Switches to give four battery power options:Power cut off at the sourcePower On, Battery 2Power On, Battery 1Power On, both BatteriesBattery selector switches provide a positive battery disconnect, which has many advantages:It gives a reliable shutdown of power during maintenanceThe version with the key protects against theft of the vehicle, when unattendedIt helps protect against electrical fires, when the vehicle is not in use, and minimizes battery drainSpecifications:Rating: 500A intermittent, 310A continuous, 6-36V DC Electrical ratings on UL labels are conservative. Electrical Ratings Labeled UL 707BUse with either alternators or generatorsMake before break design permits operation through the three On positions with the engines running. Engines should always be shut down before turning to OffHeavy-Duty Construction Vaporproof, weather-, dust- and corrosion-resistantDurable, fracture-resistant high temperature plastic case, knob and insulatorSwitches conform to USCG section 183.410 for ignition protectionHeavy duty copper stud terminals, with brass hexnutsCan be surface mounted, or installed through a 3 5/16" diameter hole in the panelDimensions: Flange: 6" (152.4mm) diameter, overall height 2 5/8" (66.7mm)Terminals: 3 copper studs, 3/8" (9.5mm) diameter