Need to hook up 2 table lamp posts at the front of driveway. 800 ft. from house. Please read on...? Need to hook up 2 light posts at the front of driveway....
Need to hook up 2 light posts at the front of driveway. 800 ft. from house.
The trenches are already built, and the pillars are hollow.
However, since these fixtures are going to be so far from the house, the electric company requests to put its own meter specifically for the fixtures.
I was told I want to have a minor distro panel for this.
1. where do i put the 2nd panel.
2. what is the code for running cable beneath ground?
3. how many amps?
4. dont I have need of a throw switch for the fixtures? if so, where do they turn.
Basically I need as much info as possible and step by step instructions.
I hold a decent amount of experience beside electric, so please dont ignore my put somebody through the mill and tell me to capture an electrician.... thanks!
Answers: Here's what i figure. 120V fixtures at 800 ft using #12 wire would experience a voltage drop of 3.1V. Upsize the rope to #10 and you get lone 1.9V of drop. Both of these seem in good health within norm. A switch to 240V fixtures still has a 1.9V drop but the percentage is cut within half. Here's a website you can use to add for yourself. http://www.csgnetwork.com/voltagedropcal... There are other solutions to this problem. First, get 240V fixtures. They cost more as they are smaller quantity prevalent but a good supplier can draw from them. Try Graybar or similar.
TO install a panel, you'll need a breaker surrounded by your main panel, afterwards cable to a junction box outside. Run Schedule 80 PVC to the ground next less expensive Schedule 40 to the panel location. Only you can determine the best place for that. It could even be on a post effective the lighting. I would run PVC instead of direct burial cable. Direct burial fails eventually. With PVC, you can effortlessly replace bad electrics or add circuits contained by the future. The number of amps needed depends on what you are running. Two lights would obligation much. Two 100-watt fixtures require only 1.6 amps at 120V, .83 amps at 240V. You don't call for a switch but a photo cell is a good opinion or they will be on all the time.
why can't you transform it down to articulate 24 volt, run the cable to your post and transform back up to the required voltage, that should solve the problem, your single on low voltage