Code-compliant approach to fixing a hot ground

What "hot ground" actually means

A hot ground is any equipment grounding conductor (EGC), grounded enclosure, raceway, or bonded metal part reading voltage to a known reference (earth, neutral, or another grounded surface). If your meter shows more than a few volts between the EGC and neutral at a receptacle, something is wrong upstream. Treat it as a fault until proven otherwise.

Common readings in the field: 60V to 120V on the ground pin of a receptacle, tingling on a metal appliance case, GFCIs that will not reset, or a neutral-ground bond that is reading current it should never carry. NEC 250.4(A)(5) requires the grounding path to be permanent, low-impedance, and capable of carrying fault current. A hot ground means that path has either been compromised or has been energized by a misconnection.

Before you touch anything, verify with a known-good meter on a known-good circuit. Phantom voltage on a high-impedance DMM is real, and chasing it costs hours. A solenoid tester (wiggy) or low-impedance meter will tell you if the voltage is actually capable of doing work.

Find the source before you fix anything

Hot grounds come from a short list of causes. Work them in order, because guessing burns time and the wrong fix can leave the hazard in place.

• Reversed hot and ground at a device (most common in DIY-modified circuits).
• Bootleg ground, where the ground screw is jumpered to neutral at the receptacle, then the neutral opens upstream.
• Open EGC with a downstream load leaking to the metal case or chassis.
• Neutral-to-ground bond made on the load side of the service per NEC 250.24(A)(5), which is a violation outside the service equipment.
• Damaged conductor in a raceway or MC cable shorting a hot to the EGC or bonded metal.
• Shared neutral on a multiwire branch circuit with a lifted or broken neutral, pushing return current onto the EGC.

De-energize the circuit, lock out per NFPA 70E, and start at the panel. Verify the main bonding jumper is correct per NEC 250.28, and confirm neutrals and grounds are separated on every subpanel feed per NEC 250.24(A)(5) and 250.142(B). One misplaced neutral on a ground bar in a sub will energize every EGC fed from that panel.

Field tip: if you see current on the EGC with a clamp meter while the circuit is loaded, you have either a neutral-ground bond on the load side or a parallel neutral path. Pull the suspect neutral off the bus one at a time and watch the clamp.

Test sequence that actually works

Skip the shotgun approach. Run this in order, and document each reading. If a customer asks why the bill is what it is, your notes are the answer.

1. Voltage hot to neutral, hot to ground, neutral to ground at the affected receptacle. Anything over 2V N-G under load points to a loaded neutral or a bond issue.
2. Plug-in tester for basic miswires, then a loaded ground tester (SureTest or equivalent) for impedance. NEC 250.4(A)(5) wants low impedance, not just continuity.
3. Clamp meter on the EGC at the panel for the affected branch. Should read near zero. Anything else means return current is on the ground.
4. Insulation resistance test on the branch with loads disconnected, hot to ground and neutral to ground, per the equipment manufacturer's threshold (typically above 1 megohm).
5. Visual on every junction box, device, and the panel interior. Look for crushed cables, pinched jackets at clamps, and ground pigtails landed on neutral bars.

The code-compliant fix

Once you have the source, the repair has to land in the code. Patching with a jumper or "lifting" a ground to make a complaint go away is how people get hurt and how licenses get pulled.

For a missing or open EGC, NEC 250.130(C) gives you the legal options on existing branch circuits without an EGC: bond to the grounding electrode system, the grounded service conductor at the service, an EGC at the originating panel, or any accessible point on the grounding electrode conductor. For two-prong receptacle replacements where no EGC is available, NEC 406.4(D)(2) allows a non-grounding type, a GFCI labeled "No Equipment Ground," or a downstream-protected receptacle labeled the same way.

For bootleg grounds, remove the jumper, pull a proper EGC, or apply 406.4(D)(2) if rewiring is not in scope. For neutral-ground bonds on the load side, separate them and verify the main bonding jumper at the service is the only N-G connection per NEC 250.24(B). For damaged conductors, replace the run; do not splice a compromised cable inside a raceway.

Field tip: GFCI protection is a code-permitted substitute for an equipment ground on existing two-wire circuits, but it is not a fix for a hot ground caused by an active fault. Clear the fault first, then decide if GFCI is the right call.

Verify and document

After the repair, repeat the full test sequence. Hot to ground should read under 2V at no load. Neutral to ground should read near zero with the circuit loaded. EGC clamp reading at the panel should be effectively zero. Plug-in tester should show correct wiring, and the loaded ground tester should show impedance within manufacturer spec for the conductor size and length.

Write down every reading, the device addresses, the panel and breaker, and the code articles you applied. If the property is older and you used 406.4(D)(2), label the receptacles as the code requires. That label is part of the fix, not optional.

A hot ground is one of the few faults that can kill someone who is not even working on the circuit. Find the source, fix it under the article that fits, test it twice, and leave the documentation behind. That is the job.