5
votes
Accepted
Electrical shutters crash computer connected to same power line
At first I thought it was a cheap PC supply, but it's the stereo also. This is big enough to affect both.
It's voltage surges
When the curtain motor reaches position, it is disconnected abruptly. ...
5
votes
Accepted
Hear current draw through AMP?
Tools like a "skillsaw" employ what is called a universal motor. These have brushes and a commutator which creates tiny sparks which generate electrical noise. That noise is getting into ...
- 23k
5
votes
Is it acceptable to run 22/4 security wire along side Cat6 and Coax cables, or is there any possibility for interference?
No cause for concern, cat 6 and other UTP network cables are very good at rejecting interference, the relatively low voltage and power of the security system will not disrupt the signal on the UTP. ...
- 24.9k
5
votes
300 ft Ethernet run parallel to 120v circuit
Since the electrical wire is in metal conduit, I would have no fear of interference. Just do not attach the ethernet to the metal conduit, as you are not allowed to use electrical conduit as a hanger ...
4
votes
300 ft Ethernet run parallel to 120v circuit
For that distance, I'd recommend using shielded CAT-6A cable. We have a similar issue in our church, and over only 150ft we found that standard cat-6 cable lost enough quality that it was noticeable. ...
- 1,426
3
votes
Diagnose interference causing garage door opener remotes not to function
Excellent article!
I just had my GDO remote drop from 30+ feet range to where I had to at the garage door - and it took several tries to cause the door to open.
I had just installed a wireless indoor ...
- 31
2
votes
Hear current draw through AMP?
Does your location have a different power circuit? Moving the saw to a different circuit may help reduce noise in your circuit.
I once saw pro's deploy a generator to power a huge jobsite bench/chop ...
- 9,779
2
votes
Hear current draw through AMP?
It is totally normal for noise especially with motor driven equipment on the same circuit.
Because of the EMF of the motor it is not recommended to have motor driven equipment on the same circuit as ...
- 102k
2
votes
Diagnose interference causing garage door opener remotes not to function
The national association for Amateur Radio (aka the American Radio Relay League or ARRL) has a PDF document about reducing radio interference. Among other things it suggests turning off the circuits ...
- 1,257
2
votes
Accepted
Radio interference , lighting
Thanks for the suggestions, I finally figured it out. This is a new one for me. Several lamps on the top fixtures were loose (still working fine but loose). When I opened the fixtures to check the ...
- 102k
2
votes
Accepted
Can an induction range cause interference in nearby Cat6 cables?
TL;DR
If your rangetop is well-built and you are using those cables only for TCP ethernet traffic, you probably won't notice any problems. On the other hand, if you rangetop's switching circuitry is ...
- 1,326
2
votes
Can an induction range cause interference in nearby Cat6 cables?
No, for two reasons:
Induction ranges operate at kHz frequencies. Modern data transmission is done at frequencies that are thousands to millions of times higher.
Cat6 is twisted, and RG6 is shielded,...
- 2,577
2
votes
LED Backlight Strips on TV Causing External Speaker Interference
Chances are that the the USB power and the AUX output of your TV share the same 5V power rail. When you connect the LEDs, you either overwork the power supply or some power modulation from the LEDs ...
- 201
2
votes
Clarifying separation of ethernet cables from cables running power (underground)
You're not allowed to mix low-voltage and mains wiring in any way, shape or form in the same cables, conduits or raceways. The reason is safety: the data cables may not threaten the power cables, but ...
1
vote
Clarifying separation of ethernet cables from cables running power (underground)
I think the answer is "separate conduit, no problem at all" but I'll leave that for the code gurus.
But (a) you may be far better off with a Power-over-Ethernet solution if you can get cameras that ...
1
vote
Accepted
Coax and cat6 close to the main power trunk
I know there isn't a black and white answer on this one, but I'm going to post the decision I made as the answer (based on everyone's feedback).
It just felt too close to run the coax/cat6 4" from ...
- 191
1
vote
bridge tap and internet connection?
The bridge tap basically just means that you have your DSL modem connected to a pair of phone wires that also branches off to (probably) other jacks in your home. All of those jacks are "bridged" ...
- 5,866
1
vote
Diagnose interference causing garage door opener remotes not to function
You may be able to check for 2.4Ghz interference by installing a WiFi router that uses 2.4 and connecting to it, then don't an internet speedtest at the suspect time. If your garage door opener uses ...
- 610
1
vote
Diagnose interference causing garage door opener remotes not to function
I had a similar problem. I have two garage doors with identical wall controls, remotes, operators. When my wife came back from the store today her remote would not open the door on her side of the ...
- 17
1
vote
Accepted
Turning light on turns power to fire alarm off
Updated solution per comment:
The fire alarm should not be connected to a switch at all. It's likely that it is connected to the same switch as the light but with the wires reversed. The solution ...
- 126
1
vote
Two A/C units are close to each other and turning one on turns the other on. How to fix?
I have 3 units air con of same brand in my office room. So all 3 units will turn on/off at the same time, by single one remote control. So I used a brown tape to cover the signal emitter to weaken the ...
- 11
Only top scored, non community-wiki answers of a minimum length are eligible