18 votes

Overloaded wire/outlet

Here's the thing: circuit breakers are not designed to trip instantly as soon as current exceeds the rated limit. Instant trips happen only when the current flow is many times the rated amperage (i.e. ...
  • 9,152
11 votes

Living room breaker will not turn on after pressure wash

Hire an Electrician It's time to get a licensed pro to fix this. Yes, this is a DIY forum, but for someone who only knows to wait 24 hours and then replace a circuit breaker, it's time to get real ...
10 votes

Garbage disposal on/off switch trips the circuit breaker when turned on

First, since you are working on a rental unit, condo or multi-unit building, only a pro electrician can do the necessary wiring changes. Most AHJs will waive this for simple things like a dishwasher ...
9 votes

outlet tripping circuit

There are many problems with the wiring and workmanship in the pictures: At the outlet, Power (black) and Neutral (white) are wired on the same Neutral side of the outlet. This results in a short ...
  • 1,953
8 votes

Can I have 2 boatlift motors (rated for a total of 22 Amps), on a old 20 amp circuit if I replace the circuit breaker with a 30amp breaker?

Only if you like electrical fires. The reason that we use breakers in the first place is to prevent wires from being dangerously overloaded. Compare the wire for your cell phone charger to the wire ...
  • 248
7 votes

Overloaded wire/outlet

I found one Siemens trip curve at this link for PDF. It shows roughly 17 seconds to 75 seconds (yes, that big a range) for a 2X trip. 2 minutes is longer than 75 seconds (1.25 minutes), but not that ...
7 votes

1987 Home Build: Multiple 14ga Switch Loops on 20 AMP Circuit

Either it wasn't actually inspected, or someone "upgraded" the breakers after it was inspected. 14 AWG on 20A circuits was not allowed in 1987 (nor 1967), and it's not allowed now.
  • 145k
6 votes

outlet tripping circuit

From the new pictures you have quite a few problems. Thanks for the pictures. On the the outlet,first problem, black goes on the other side. Not doing so created a full blown short circuit. Second ...
  • 11k
6 votes
Accepted

Multiwire Branch Outlet GFCI/AFCI breaker need but no product

A "deadfront" GFCI, AFCI, or both is a means to have the reset/test "Accessible" without having to have it "as a breaker." But, a deadfront AFCI has to have the circuit ...
  • 145k
6 votes

Garbage disposal on/off switch trips the circuit breaker when turned on

TL;DR MWBC with split duplex receptacle, incompatible with a direct GFCI duplex receptacle replacement Based on "share 2 15 Amp circuit breakers", I suspect you have a Multi-Wire Branch ...
5 votes

Carpet washer keeps tripping main switch

Certainly sounds like you are in an area with a RCBO on the main switch and the carpet washer has a >30ma ground fault, since there's no conceivable way that the cord to that device could carry ...
  • 145k
4 votes

Breaker Switch only Working with Certain Lights

What does the bus stab where the breaker came from look like? And what do the stab jaws on the breaker look like? Challenger breakers are defective even if used in Challenger panels, but they are ...
  • 3,356
4 votes

Breaker for 4/0 125A feed from Siemens W0816MB1200CT main panel? Q2125 only does 2/0

Go ahead and attach to the bottom lugs. I am confused as to whether you have 125A or 200A service. No matter; the answer is the same way. The wire "you happen to have lying around" is ...
4 votes

Can I have 2 boatlift motors (rated for a total of 22 Amps), on a old 20 amp circuit if I replace the circuit breaker with a 30amp breaker?

No, because you probably only have 12 gauge wire running from the breaker to the boat motors. 12 gauge wire needs to be protected with a 20 A (max) breaker. I had a similar situation, but I had two ...
  • 4,478
4 votes
Accepted

outlet tripping circuit

You wired the hot and neutral together. Fix this.
  • 671
4 votes

outlet tripping circuit

You created a DEAD SHORT by wiring the hot and neutral to the same side of the outlet. No wonder why the breaker trips immediately. I don't want to be mean, but this is a VERY basic mistake and you ...
4 votes
Accepted

Replacing breaker with GFCI/AFCI causes trip

What you have there is a Multi-Wire Branch Circuit This is where 2 hot wires in a single cable share a netural wire. The neutral handles return current for both hot wires, and this is safe if certain ...
4 votes

Living room breaker will not turn on after pressure wash

There is still one thing that isn't clear to me. You said you replaced the breaker but still no power on that circuit. Does that mean the new breaker immediately re-trips when turned on, or does it ...
  • 2,372
3 votes

Overloaded wire/outlet

I may get snipped for this, but frankly, most electrical has some level of safety margin built into it. Normally a couple of minutes of over-use won't hurt anything. The wires in the wall won't melt ...
3 votes

CAFCI breaker - found loose pigtail to neutral connection

A loose connection may make functionally useful contact, or it may not. It's hit or miss. If not, it has a fair chance of arcing, creating tremendous heat, damaging the neutral bar and starting a ...
3 votes
Accepted

Why does a particular circuit breaker keep tripping?

Found your problem. Look at the list of appliances on this single circuit. And their amperages @ your household voltage of 230V. Vacuum cleaner - 1-4 amps Bathroom sink water heater - 8-20 amps (...
3 votes

Feeding a breaker panel through a 120v outlet

Take a 3-prong extension cord that is 14 AWG or 12 AWG. Lop off the socket (female/holey thing) end and throw it in the trash. Take it to an electrical supply and get a compression strain relief/...
3 votes

Circuit breaker keeps tripping and wires automatically loosens

First, all terminals must be torqued using a torque wrench to the specification on the breaker. This is VERY important. Failure to do this will cause arcing and burn-up of those wire connections, and ...
3 votes

Multiwire Branch Outlet GFCI/AFCI breaker need but no product

AFCI requirements I don't understand. Why did you run a new MWBC in this day and age? These kinds of problems are exactly why people stopped using them. If you're using an existing MWBC, then that is ...
3 votes

Bosch Combo Oven wiring

Is this normal that a unit requiring a 240V/40A has 10AWG connecting wires? The rules for "wires in walls" are often different from "wires in appliances". There are a few reasons, ...
3 votes

Garbage disposal on/off switch trips the circuit breaker when turned on

It appears that before you started you had a split receptacle - bottom half switched for the disposal, top half unswitched for the dishwasher, each on its own breaker, probably an MWBC. There's ...
  • 145k
3 votes
Accepted

What may cause a single circuit to go down temporarily in a house?

It sounds like a faulty wire connection. Those are BAD. Faulty connections are a recipe for house fires. While it may simply interrupt power now, it has a much more dangerous failure mode where it ...
3 votes
Accepted

How to wire a NEMA 6-50 receptacle to a 240V GFCI breaker?

The GFCI breaker will have a neutral pigtail, or PON. It needs that to power the breaker's internal electronics, but it also carries load neutral on a 120/240V circuit. If you have a 240V-only ...
3 votes

1987 Home Build: Multiple 14ga Switch Loops on 20 AMP Circuit

For a circuit to be "grandfathered" in, it must have been in code when installed and not changed. A circuit using NEMA 10-30 hot, hot, neutral(now banned) installed before the 90s can be ...
  • 11k
3 votes

Living room breaker will not turn on after pressure wash

If you can replace a circuit breaker, you can open up a receptacle box and inspect it / clean it out. That's what you have to do on all the receptacles, because obviously pressure washing either ...

Only top scored, non community-wiki answers of a minimum length are eligible