Ideal for campgrounds and marinas. Our single or double weatherproof meter installation kit makes it simple to retrofit your sites with meters for either 120 or 240 volts. Both meters and sockets have 100 amp capacity. Standard kit size 1". This normally offers ample room for your wires. If you are ordering a double unit (more wires pass through the bottom nipple) or you would like to just have more room, you may specify 1 1/4" when ordering.