I have gfci outlets in my house and they fail when they are tested with the plug in one since they have no grounded. They are all labeled "no equipment grounded" does that make them up to code?
Not an electrician, but how old is your house??
What do you mean the fail, as in the power is still on??
Can even replace older ungrounded, twoslot
receptacles with new GFCI receptacles.
Must use supplied label “NO EQUIPMENT
GROUND GFCI PROTECTED” to identify
that the receptacle is not grounded.
It appears that the non gfci outlet, just does not have a ground, for equipment that may be plugged into it, but the gfci will still work.
It appears the non gfci that the gfci is protecting has to be grounded back to the gfci:::
Can I use a GFCI in a 2 wire (ungrounded) circuit? | Leviton Online Knowledgebase
you can get a tester and check various items on an outlet:::
Shop Southwire Analog Voltage Detector Meter at Lowes.com
The TEST button on a GFCI device and plug-in GFCI receptacle testers do not work on “No Equipment Ground” GFCI and GFCI-protected (i.e. load-side-connected) receptacles. The test shunts just enough current from the ungrounded conductor to the equipment ground to trip the GFCI. With no equipment ground, no current can or will flow. The GFCI will not trip even if the GFCI is functioning properly.
A GFCI is specifically designed to protect people against electric shock from an electrical system, and it monitors the imbalance of current between the ungrounded (hot) and grounded (neutral) conductor of a given circuit. With the exception of small amounts of leakage, the current returning to the power supply in a typical 2-wire circuit will be equal to the current leaving the power supply. If the difference between the current leaving and returning through the current transformer of the GFCI exceeds 5 mA (61 mA), the solid-state circuitry opens the switching contacts and de-energizes the circuit. Because of the design of the GFCI, a ground is not necessary for it to work. The label "Not Equipment Grounded" is intende to let the user know that the circuit does not have a ground conductor (it is a two wire system).
It is a perfectly acceptable installation. 406.4(D)(2)(b) allows a non-grounding type receptacle to be replaced with a GFCI receptacle as long as the GFCI is marked " No Equipment Ground". This replacement is permitted due to the design and operation of the GFCI. Internally, there are CT's that monitor the current on the ungrounded and grounded (neutral) conductor. If there is any leakage beyond the acceptable limits, the receptacle will trip. Please note that the only acceptable method for testing GFCI receptacles is to push the test button on the GFCI receptacle itself. The 3rd party plug in testers are not to be used as an approved method for testing the GFCI receptacle.
While NFPA 70 NEC does permit GFCI receptacles and grounding receptacles down stream from a GFCI to be installed without an equipment grounding conductor provided they are labeled GFCI protected No equipment Ground, homeowners using these receptacles have no idea regarding the significance of the"No Equipment Ground" label if it has in fact been installed and hasn't fallen off. The homeowner assumes that since the the cord with a grounding type plug cap fits into the receptacle then it must be acceptable for use. However, most utilization equipment with a grounding plug cap requires it be connected to a receptacle with an effective equipment ground. Therefore, plugging that equipment into a receptacle without an equipment ground is a violation of the equipments listing. There is no way Joe/Joan homemaker is going to understand these requirements. The reality of this situation is that this equipment is going to be plugged in so it is better to have at least the GFCI protection rather than having no protection and no equipment ground.
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