Average Reviews:
(More customer reviews)I ordered this unit to replace a Intermac unit I had installed 10 years ago. It finally gave up the ghost in the last storm we had and needed replacement. This unit had the specs I was looking for and was UL1449 compliant. I was a little surprised when I got it how heavy the box was..this unit comes in a heavy metal box and a single sheet of instructions. Inside the metal box is a plastic cube about 4"x 4". Instructions, one side minimal words, the other side a diagram.
The unit is not prewired like many of the other units. So challenge #1. What guage wire should you buy to run from the box to the electrical panel. Not stated anywhere in the instructions. After talking to a electrician --I went with #12 solid. It can take up to #8. Challenge #2 you need to ground the metal enclosure and your main electrical panel (or) in other words, use metal clad conduit between the two boxes. An alternative which is not very clearly stated in the instructions is you can run non-metalic conduit but you also need to connect the green wire in the Leviton thru the conduit to the main electrical panel by bolts. (I actually used a rigid metal connector to connect the boxes but use an offset one since the knock outs are off center.)
#3 is connecting to (2) 20 Amp circuit breakers in your electrical box. This box is for single phase houses (there is another model if you house is 3 phase). The 2 circuit breakers must be right next too each other at the top of the box on the same side. This is so you can cover both phases in your house A/B. To make it easier for you to understand, circuits 1, 5, 9, etc. and 2, 6, 10, etc. are "A" phase. Circuits 3, 7, 11, etc. and 4, 8, 12, etc. are "B" phase. You could select other 20 amp fuses but you need to make sure they are on the different phases A/B. (If your new to this, looking a breakers can be confusing since many houses have dual single pole, 30 amp, piggy back, etc. Your looking for 2 circuit breakers that are physically not joined together in a single unit. No cross switch connector, etc. You should also not install your whole house on a circuit that is in use by other equipment. They say this degrades the peformance. I have a neighbor who did but he claims since he didn't care about the stuff on the two circuits he piggybacked on, so it would work fine. Can't say this is true or not.
So if you have two open 20amp circuit breakers at the top of your panel on the same side, that are in a row, and your not using them --lucky you the rest is relatively easy. If not you ve got some work ahead of you. If you do, turn off your main circuit breaker on the panel. Remove the main panel cover. Mount the Leviton box (as close to the 20 amp circuit breakers as you can), make the grounded connection to the main panel (if metal conduit ignore this step), pull the 3 wires, connect 2 black hot (one in each breaker), 1 white ground strip. Close it up and your done.
Click Here to see more reviews about: Leviton 51120-1 120/240 Volt Panel Protector, 4-Mode Protection, Light Commercial/Residential Grade, In NEMA 1 Enclosure
120/240 Volt Panel Protector 4-Mode Protection, Light Commercial/Residential Grade, in NEMA 1 Enclosure , UPC: 07847782764
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