Jump to content

Cat5 and power cords


morningsidemustangs
 Share

Recommended Posts

morningsidemustangs

Is there an interferance issue with running the control cable in close proxcimity to power cords? Particularly parallel with them. How about building saftey codes, generally speaking?

Link to comment
Share on other sites

As usual, this depends on a number of factors:

  • How close are the cords?
  • How much current is running through the power cords? (More current means more magnetic induction.)
  • How long is the run where they are together?
  • How far away is the computer? (Closer means a better signal.)

Building codes end at the outlets. But the codes say that power (medium voltage) signal (low voltage) cable can't be run through the same conduit or into the same undivided box.

A safety issue will arise typically where water is found. If a LOR controller gets flooded, there is a potential for the power to find its way into the network cable. If the outlets are GFCI protected, this should not be a safety problem, but it could damage some electronics.

In one case, someone had an SSR on the lawn. When the lawn flooded, the current found its way back to the digital I/O card in the computer and destroyed the board.

Link to comment
Share on other sites

morningsidemustangs


Steven wrote:

As usual, this depends on a number of factors:
  • How close are the cords?
  • How much current is running through the power cords? (More current means more magnetic induction.)
  • How long is the run where they are together?
  • How far away is the computer? (Closer means a better signal.)


The plan would have the Cat5 running next to (making contact the whole way) a 10/4 cable caring a 30 amp, 240v for 30-50ft.

Thoughts?
Link to comment
Share on other sites

Someone here explained why the RS485 and the 120V power cords won't interfere with each other. Otherwise all of us who run our cat5 next to the power in cord would be having problems.

This may not be up to code or whatever, but it works just fine.

Link to comment
Share on other sites

morningsidemustangs wrote:

The plan would have the Cat5 running next to (making contact the whole way) a 10/4 cable caring a 30 amp, 240v for 30-50ft.

Thoughts?

Last year I ran Cat5 along with a 16/2 (orange, no ground) cable for about 15 feet in a small slot I cut though the lawn.

I wouldn't expect any problems with your run. The reason is that Cat5 cable is "twisted-pair". The reason for the twist is that any interference that gets picked up on one wire will get cancelled out by the same interference on the other wire. The 10/4 cable probably also has a twist to it, and probably a thick jacket.
Link to comment
Share on other sites

Guest
This topic is now closed to further replies.
 Share

×
×
  • Create New...