Ground to neutral buss/connector on receptacle


I'm replacing an old/aged receptacle. Incoming hot wired to hot on receptacle. Neutral had been previously connected but snipped off and wire is loose in box (copper end more or less insulated). Incoming ground is wired to ground on receptacle and then jumpered into the neutral connector on the receptacle. It appears it was originally wired as I would have thought appropriately but then later altered. The original wiring is mid-70s vintage. There are no other conductors in the box so it's not in series with anything (at least visibly in the box).

I suspect this wiring has been in place for decades without issue but this feels like a hazard. Can't think why it has been altered in this way. My thought would be to pull this and wire new receptacle in traditional manner.

Any reason anybody can think of why I shouldn't proceed with traditional wiring on new...

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By Timothy Thiele

Updated September 28, 2016.

In your home, you have many different types of electrical devices that keep your home running smoothly for convenience and practical uses. Among them are different types of receptacles that are both needed and required by the National Electric Code. GFCI and arc-fault receptacles are a couple that come to mind, and then there's the specialized ones that have their specific uses.

Isolated-ground receptacles have their uses in today's home. They are used to provide power to and protect circuit feeds, like those that have sensitive electronic devices attached to them. Quite often, electromagnetic noise becomes a problem in a regular ground wire's system and this noise is transmitted though audio systems. This can also effect picture quality on television screens. Quite often this noise results in a humming or buzzing sound.

Wiring an isolated-ground receptacle isn't all that difficult. You'll need a three...

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Before you start working with line voltage in your electronic circuits, you need to understand a few details about how most residential and commercial buildings are wired. The following description applies only to the United States; if you’re in a different country, you’ll need to determine the standards for your country’s wiring.

Standard line voltage wiring in the United States is done with plastic-sheathed cables, which usually have three conductors. This type of cable is technically called NMB cable, but most electricians refer to it using its most popular brand name, Romex.

Two of the conductors in NMB cable are covered with plastic insulation (one white, the other black). The third conductor is bare copper. These conductors are designated as follows:

Hot: The black wire is the hot wire, which provides a 120 VAC current source.

Neutral: The white wire is called the neutral wire. It provides the return path for the current provided by the...

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When clients call you because operating problems on pieces of their 120V equipment cause them to suspect their facility's power supply, you have to decide where to start your investigation. Don't proceed directly to the distribution panelboard that feeds the circuit first. Instead, first look at the outlet nearest the problem equipment.

The next step is deciding what measurement to make, but you only have three options to choose from: phase-to-neutral voltage, neutral-to-ground voltage, and phase-to-ground voltage. With these measurements, you're well on your way to answering the following questions:

Is the outlet wired wrong?

Is the branch circuit too heavily loaded?

Do sensitive electronic loads have the voltage they need?

Believe it or not, you can get that much information from such fundamental yet simple measurements. The three measurements, all...

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just want to clarify my situation i have a 400a service with 3 4/0 leads, two hots each feeding a 3 lug that sends 2/0 hots to each 200a main panel.

the 4/0 neutral goes right to a metallic 6 lug bar that is bolted to the base of the wiring trough (where all of the above mentioned connections are made).

From that 6 lug you have 2/0 neutrals going to each main panel and you also have the whole house ground/earth (that then travels down conduit to ground rod just below trough).

so meter neutral is fed to metal 6 lug in direct contact with metallic trough, 6 lug also has main ground.

(in each main panel, the neutral buss and ground buss are bonded of course).

AFAIK this is a fine setup, no way for the metallic case to see load because that 6 lug is also house earth)....right? You guys have me paranoid....thx!

All neutrals/grounds are bonded at the service entrance right? (and this is because neutral is bonded to earth at service...

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I'm not sure exactly what the question means, but this is one plausible interpretation:

The popular receptacle testers with the 3 lights are designed to detect only single faults. If the outlet is ungrounded, the ground terminal (or electrical box) is shorted to hot, and the hot and neutral are reversed, the tester won't detect this condition--the lights will indicate that the outlet is wired correctly. (I've actually seen this happen.)

Photo by Wikimedia Commons user AndrewBuck

This happens because of the way the tester works. The yellow lights are connected from hot to neutral and hot to ground, and the red light is connected between neutral and ground. In this 3-fault situation, the red light does not come on because both the neutral and ground are at the same voltage, and the yellow lights come on because the neutral and hot/ground are at different voltages, just like in a properly wired receptacle. The difference is that the neutral and ground are both...

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