r/ElectricalHelp

Digging to pour a concrete footing for a deck post and found this. One yellow cable and two black cables. About 40" below the ground. I have a shed with electricity, could it be the power supply?

Digging to pour a concrete footing for a deck post and found this. One yellow cable and two black cables. About 40" below the ground. I have a shed with electricity, could it be the power supply?

u/KernowWarrior — 3 days ago
▲ 2 r/ElectricalHelp+1 crossposts

Before I book a Tasker

Some of the electronics in my apartment have been acting a little funky. For example, my Xbox just won't turn on now. I had to get a new laptop. Lastly, I had to get a new microwave because our microwave just stopped working.

I went to go check the outlets in the kitchen. I've attached the video here. Can someone tell me, from an electrician's perspective, how bad this is before I get a Tasker to come over here and help out?

Thanks in advance

streamable.com
u/coffeebeforechitchat — 2 days ago

Campervan leisure battery help

Hi all,

I have a campervan with an AGM leisure battery and electrical system I installed myself (system itself was designed by a company). Everything has been working fine apart from my charging system from the starter battery. Old non-smart alternator therefore I installed a VSR (voltage sensitive relay) for battery to battery charging. So I have a thick cable directly connecting my starter battery positive to leisure battery positive via the VSR and 2 high ampage fuses. This initially worked great, when I turned the engine on I could see the voltage of my leisure system jump up to 14.2V. 6 months down the line its stopped working and I've no idea why, I've tried the following:

- tested ground connection for starter battery with engine off and on, looks good.

- tested ground connection for leisure battery, looks good.

- tested the end of the cable (including the 2 fuses but not the VSR) run going to leisure battery against ground, reading 14.2V.

- above test implies to me the fuses are good. Also swapped in different fuses, no difference.

- tried bypassing the VSR and connecting the +ve cable from starter directly to +ve terminal of leisure battery but no change, still read 12.5v across leisure battery terminals.

I'm now completely out of ideas. Possibly an issue with the battery? Or a ground connection? Please help!

reddit.com
u/Plain-Dane2 — 2 days ago
▲ 6 r/ElectricalHelp+1 crossposts

Table saw runs backwards

I need some help, Mabe this is the wrong place to ask but I figured I'd give it a try. I put this table saw back together from parts that were given to me. But the Motor runs CCW viewed from the drive end which turns the blade backwards. I have it wired for 250v and I confirmed that I'm getting this voltage from the wall socket. Two 125v wires red and black. I've tried various things from another Reddit forum. Switching black and yellow. No change. Switching grey and black(motor did not turn at all). Switch black and grey and also red and yellow. Still no change. Is it even possible? Black and grey have continuity about 0.5ohm and red and yellow have continuity 0.5 ohm? There are two capacitors attached to the side. I believe I'm trying to reverse the starting relay. Please let me know if it's somehow possible to get this thing to spin cw.

u/scott4031 — 3 days ago

Help with bathroom humidity fan switch

Bathroom humidity sensor/fan control wiring problem

Hey all,

Hoping I can get some help here. I am trying to install a humidity sensor for my kid's bathroom exhaust fan (they always forget to turn it on).

Currently the fan light is on one toggle switch and the other toggle switch only controls the fan. The toggle switch was wired with a hot and a load along with a ground and works fine.

The problem I am having is with the new switch. It requires the line/load (which it says is interchangeable), the ground, and a neutral which isn't a problem, the box was wired with a neutral as well.

In theory, when I turn the power on, there is supposed to be an LED light that turns on and I should be able to control the fan.

In reality, when I turn the power back on the fan just turns on constantly. No LED, and I cannot turn off the fan with the switch. It is basically acting as a passthrough.

Anyone have any ideas?

u/JermD303 — 3 days ago

220v Two Wire Question (0v / 220v - NOT 110v / 110v)

I'm in Asia, and everything is run Black / Black wires so you cannot tell which is hot. Is there any impact for the flip/flop of the 0v line vs 220v line? They don't seem to be concerned here...

reddit.com
u/Repulsive_Cheetah_54 — 3 days ago
▲ 3 r/ElectricalHelp+1 crossposts

Lights flickering periodically?

EDIT/UPDATE: I found the culprit. I have a Hayward HeatPro pool heater that is doing something every 4-7 minutes, making a buzzing sound at the unit and a buzzing sound at the breaker box. I killed the unit's dedicated power at the shutoff valve by the pool and it's stopped. So, not a RI Energy or Transformer issue.

It just started recently. I noticed every couple minutes the lights start slightly flickering and dimming. I’m in an area that is going through a heat wave right now but there’s not a ton of stuff running at this moment. I use Sense to understand what’s running in the house and I don’t see any spikes or abnormal usage when these flashes happen what could possibly be happening? I’m trying to figure out if this is a potentially dangerous situation.

reddit.com
u/ThisIsMyBigAccount — 4 days ago

LED Lights Flicker in House when loads running

Looking for some guidance here -

About 6 years ago we added a pool, and fed the pool shed with 2x 100A panels, each coming off of a different one of the main home's 200A panels. The pool has some heavy loads, including 4x 3HP pumps, and a heat pump, plus other stuff.

Ever since adding these loads, whenever all of the pumps are on at once - lights on the other end of the house start to flicker noticeably. These are basic LED bulbs on dumb switches.

Any thoughts on what could be going on?

reddit.com
u/vettewiz — 4 days ago

RTU wont emergency shutdown

I’m installing a wire from one of the rooftop units on my current job to a duct smoke, the duct smoke activated a relay module to open or close the contact. We have it set to normally closed for the RTU to run in normal conditions, when test switch is activated and or duct smoke unit should go open and shut the unit down however when looking at our board in the unit we see that the way they have it setup to run temporary is by taking the 24 v into the board and jumping it onto these “R” and “C” terminals. Assumed at first this was constant power and common however not sure, they used these terminals to constantly run the unit and by pass the shut down mechanism.

We would like to use the fire alarm wire to be the wire that turns the machine on not by jumping it out however it seems like when we go to hook up the unit how it should be wired it remains bypassed and stays on. Did the techs before Jerry rig it? Do we need 2 fire alarm wires instead of 1?

We verified all our equipment isn’t faulty and assuming it to be the wiring

u/CMLtheProductorTTV — 4 days ago

Aluminum Gazebo / aerial electrical cable

Hello everyone.

I am living in Sacramento, CA. and I want to buy and install in my backyard an aluminum gazebo/pergola which is 10x10 feet and 8 feet high and separate from the fence by 2 feet; however, behind the fence is running an aerial electrical cable which I calculated is 15 feet (you can see a photo). Can someone please advise me if I can? I tried twice to contact SMUD, the electric company in Sacramento, and they provided me with a manual of Residential overhead installations. (see image 2). Any feedback I really appreciate.

u/Chanoise — 5 days ago
▲ 3 r/ElectricalHelp+1 crossposts

AC Disconnect Wiring

I’m installing an AC disconnect for a mini split. The disconnect is going to be within 5 feet of the panel and I plan on running the wire through the wall directly into the back of the disconnect switch. Can I run Romex 12/2 from the panel to the disconnect? Or should I run THHN/THWN from the panel since disconnects aren’t waterproof?

reddit.com
u/okstate_cowboys_2020 — 4 days ago

My outdoor outlet is black??

I think a fuse was blown. Someone came to powerwash my house today. therevis a cover on our outside outlet and 10 hours later I go outside and the outlet is black. My brother was also messing with the fuse box earlier so I’m not sure what is the cause. Can this wait till the morning or?

u/sunshineart15 — 5 days ago
▲ 3 r/ElectricalHelp+1 crossposts

Trying to wire up my compressor project

Trying to hook up my air compressor

Got this compressor project and need help with the starter box. Where should the wires going to the motor connect inside the box?

Also, the wire from the Off/Auto switch is going to the fuse on the far left, and I have one of the wires from the pressure regulator going to the other side of that fuse, is that correct?

The forth picture is the old electrical box that it came with for reference

u/Terrible_Accident685 — 5 days ago

Electric/sockets

Anyone know why none of my bathrooms or backyard sockets would not work? I replaced the GFCI one that connects them, but they are still not working. Should I replace the regular ones too? Want to troubleshoot myself before I call an electrician.

EDIT: I will recheck the connections to the GFCI outlet we replaced. If I’m still having issues, I will replace the regular outlets on that circuit. Thank you everyone. I will update with results.

reddit.com
u/EBM911 — 6 days ago
▲ 4 r/ElectricalHelp+1 crossposts

DIY help! Sconce replacement with mismatched wiring 🤦‍♀️

Hi! I’m hoping you kind smart people can help me. I started changing our master bedroom sconces because I thought it’d be an easy swap out. Our new sconces require 3 wires - while, black, copper. I assumed the old ones were the same but when I took them off the wall they had 5 wires attaches. I’ve attached pics of key points in the removal process for reference.

- last photo: shows the old sconce assembled on the wall. You can see there are 2 bulbs.
- first photo: you can see that each white lightbulb holder has its own white and black wires coming directly from the wall
- second, third, and fourth photos just show the wires coming out of the wall and what is behind the wall that you can see (ie, not much)

Any input would be much appreciated!!!

u/Fantastic_Tap8092 — 6 days ago

Quick Electrical outlet question

What am I missing causing no power to my switches? I changed out white outlets to black, one by one so I know where each wire went. Well this one red wire on the middle switch came out not attached to anything or maybe I pulled it out from something and now I can’t get power. Where does it connect to? Is this a pigtail?

u/Specific_Ad_6116 — 6 days ago
▲ 3 r/ElectricalHelp+2 crossposts

12V DC Landscape Lights Jamming Garage Door Opener (Random Opening)

Hi,

I have a strange issue and i hit a wall and cannot solve, need help:

I installed a 12V DC landscape lighting system (10 LED fixtures). Power is supplied by a 60W DEWENWILS transformer (also tested a 100W unit from another brand). When the lights are ON, my garage door remote range drops from 300+ ft to ~50 ft, and the door randomly opens on its own at night.

What I've tested:

  • Lights OFF → remote works fine (300+ ft)
  • 2 LEDs only → works fine (~250 ft, no random openings)
  • 4 LEDs → range drops to ~30-50 ft, random openings occur
  • 6+ LEDs → remote barely works, random openings continue
  • All 10 LEDs → nothing works!
  • Installed ferrite cores on the 12V output and each branch → no change
  • Extended the opener's antenna using coax (center conductor exposed, shield grounded) → range improved slightly, but random openings persist
  • Swapped transformer (60W → 100W, different brand) → no change

The issue:
The problem seems to scale with the number of LEDs connected. The random opening is the main concern—I can live with reduced range, but I cannot have the door opening by itself.

Goal:
I need to stop the random openings without replacing the entire system. I'm open to suggestions.

Setup:

  • Opener: LiftMaster/Chamberlain (rolling code, 315/390 MHz)
  • Transformer: 60W 12V DC (DEWENWILS) / 100W DC (other brand)
  • LEDs: Standard 12V landscape spotlights (integrated driver) (Aiwewin 12 Pack 6W Landscape Lighting - B0CNK5435Y)
  • Location: Lights are mounted on exterior walls and soffits, surrounding the garage on 3 sides

Thanks...

reddit.com
u/SwimmingSir8027 — 7 days ago
▲ 2 r/ElectricalHelp+1 crossposts

Can I use a 15 amp 125 volt extension cord for my 15 amp 115 volt AC?

I’ve been looking for an extension cord with the exact match but I’ve only find 125 volt not 115 volt, I’m wondering if it’s safe to use to avoid any risk

reddit.com
u/mz-FL — 6 days ago

Bus lights

Looking for help fixing light issues with my 2003 chevy express 3500. It was made into a prison bus before I bought it last year. I renovated it into a mobile home for travelling. Currently the high mount brake lights in the rear are not working, I replaced the bulbs and the fuse under the drivers seat. The reverse lights in the rear are also not working and replaced bulbs and fuse as well. One of three high mount front light is out, bulbs and fuse were also replaced. I did have the license plate light out but after changing bulb and fused that one worked. I need all these lights to work to pass a NYS inspection. Any tips?

under drivers seat fuses 13,4,16,6,14,19,20,21,22 and
under hood 28,3,4,9,10,42,43,44,45, fuses reading 0v but pass the beep test
wires from ignition red pink and orange all at 12v

reddit.com
u/Temporary_Double_132 — 8 days ago