When I'm done with the current project (hopefully today or tomorrow) I'm going to start in on adding some additional lighting to the back yard.
These will probably be 3-4 high powered lamps that could be anything from incandescent to HPS, mh or led. I'm currently undecided. The lights will be mounted on one of the walls dividing my yard from my neighbors and will require new electrical wiring.
The goal is to have them controlled remotely with through a LAN networked Arduino based controller. I've been playing around with my new toy -*cough* I mean my High Value TCP/IP Lighting controller - , and I think I have a handle on the software aspects. As far as I can tell there are two ways I could wire the lights.
Directly from the contacts on the Arduino board to relays at the light at 5vdc. Or from a set of relays located at the board to each lamp at 220v
The wiring will be going through new conduit and 5/8" will comfortably hold the conductors for either option.
The total distance is going to be ~100ft to the farthest light and 26 to the first one. With a hypothetical 4 lamps that be 100, 75, 50 and 25.
By code I can't run mains voltage on anything smaller than .75mm2 conductors for more than 12ft.
$0.006 / ft for low voltage rated 20awg conductors.
$0.029 / ft for 0.75mm 70C insulated conductors
2*.029*100 + .006*75 + .006*50 +.006*25= $6.70 in cabling
2*.029*100 + .029*75 + .029*50 +.029*25 = $10.15 in cabling
Which is really not an important difference in the grand scheme of things and was a lot of probably unnecessary exposition for the question:
Is there any reason beyond the cabling cost for me to choose to place a relay at the light vs a relay with the controller.
Relay location for remote controlled outdoor lights?
These will probably be 3-4 high powered lamps that could be anything from incandescent to HPS, mh or led. I'm currently undecided. The lights will be mounted on one of the walls dividing my yard from my neighbors and will require new electrical wiring.
The goal is to have them controlled remotely with through a LAN networked Arduino based controller. I've been playing around with my new toy -*cough* I mean my High Value TCP/IP Lighting controller - , and I think I have a handle on the software aspects. As far as I can tell there are two ways I could wire the lights.
Directly from the contacts on the Arduino board to relays at the light at 5vdc. Or from a set of relays located at the board to each lamp at 220v
The wiring will be going through new conduit and 5/8" will comfortably hold the conductors for either option.
The total distance is going to be ~100ft to the farthest light and 26 to the first one. With a hypothetical 4 lamps that be 100, 75, 50 and 25.
By code I can't run mains voltage on anything smaller than .75mm2 conductors for more than 12ft.
$0.006 / ft for low voltage rated 20awg conductors.
$0.029 / ft for 0.75mm 70C insulated conductors
2*.029*100 + .006*75 + .006*50 +.006*25= $6.70 in cabling
2*.029*100 + .029*75 + .029*50 +.029*25 = $10.15 in cabling
Which is really not an important difference in the grand scheme of things and was a lot of probably unnecessary exposition for the question:
Is there any reason beyond the cabling cost for me to choose to place a relay at the light vs a relay with the controller.
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