Question about Hammering
While a lot of people have replaced a lot of 2 prong ungrounded outlets with 3 prong outlets, as you probably know, it is an unsafe practice. The National Electric Code (NEC) permitted method is to replace the 2 prong outlet with a 3 prong GFCI outlet such as this:
For multiple outlets, the usual practice is to install the GFCI outlet at the first outlet in the circuit, then regular 3 prong outlets can be used to replace 2 prong outlets in all the downstream outlet locations as long as the "no equipment ground" stickers that come with the GFCI outlet are used and they are now GFCI protected outlets, per NEC.
Finding the first outlet in the circuit is not always easy. First, determine which outlets are on the circuit, then starting with the outlet closest to the electric panel, disconnect the wires and see if all the other outlets went out. It's kind of trial and error.
Once you have found that first outlet in the circuit, connect the hot wires coming from the electric panel to the LINE terminals of the GFCI and the wires going to the downstream oulets to the LOAD terminals of the GFCI. Full instructions come with the GFCI outlet.
The GFCI receptacles sold today won't work if connected incorrectly, so you will soon know if you did it wrong.
Once the GFCI outlet is installed at the first outlet, all of the downstream 2 prong outlets can be replaced with 3 prong outlets, using the stickers mentioned above to indicate that the outlets are not grounded.
Strange as it sounds, all downstream outlets _must_ be ungrounded when using this method.
Posted on Aug 30, 2010
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Posted on Jan 02, 2017
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