Exactly How to Ground a Nongrounding-type Receptacle
An gear grounding conductor shall never be connected through the GFCI receptacle that doesn’t have a gear grounding conductor to virtually any other socket given by the GFCI receptacle, plus a gear grounding conductor shall never be linked between grounding-type receptacles which can be protected by way of a GFCI kind receptacle which has had no gear grounding conductor.
Got that! Good. In addition they wonder why electricians are paid plenty. All things considered this we nevertheless do not have a grounding conductor for the computer when there isn’t one available in the place that is first. But wait, all we need to do is get to some other Code making Panel to check out whatever they need to state about this. Panel No. 2 writes Article 210, but Panel # 5 writes Article 250. And in 250-50(a b that is)and( Exception it states, “For replacement of nongrounding-type receptacles with grounding-type receptacles as well as for branch-circuit extensions just in current installments which do not have an gear grounding conductor within the branch-circuit, the grounding conductor of the grounding-type receptacle socket will be allowed become grounded to your available point in the grounding electrode system as described in 250-81.” And. the 1996 Code allows this connection at any point that is accessible the grounding electrode conductor.
It to any accessible point on the grounding electrode conductor (after the 1996 NEC is adopted) so we can add a grounding-type receptacle to an existing system that does not have an equipment grounding conductor and ground the grounding terminal to the first 5 feet of water pipe that enters the building if this pipe is metal and part of the grounding electrode, or connect.
Now anybody understands, you simply do not run a cable any longer without finding down all of the rules that apply. Setting up this grounding cable isn’t any exclusion. You can find rules in the color, the dimensions, the correct wiring technique, real security, as well as workmanship.
Let us begin with the colour. The NEC informs us in 2 places (310-12(b) and 250-57(b)) in regards to the colour regarding the grounding conductors. The grounding conductor should be green, bare, or green with a number of stripes that are yellow exceptions for insulated conductors larger than number 6 and conductors in multiconductor cables.
Next, why don’t we address size. The scale is founded on the device that is overcurrent the circuit. We utilize dining dining Table 250-95 with this. A no. 14 copper or No. 12 aluminum conductor is necessary for the 15 ampere overcurrent protective unit. A no. 12 copper or No. 10 aluminum conductor is required for a 20 ampere overcurrent device.
How about the wiring technique? As a whole conductors needs to be run in cables or raceways. Open conductors are permitted making use of a few wiring methods such as for instance cable trays, concealed knob and pipe, and available wiring on insulators. But none of the would use here. Exceptions are made in a number of places to permit the apparatus grounding conductor for the grounding-type receptacle that’s been put into a circuit where no equipment grounding conductor can be obtained to be run split through the other circuit conductors also to run on it’s own with out a raceway or cable. Then to 250-57(b) exclusion No. 3. To stick to the Code on why this conductor are run on it’s own with out a cable or raceway head to 250-92(c)(2) as well as the exclusion if you’d like to proceed with the Code on why this equipment grounding conductor is run split through the circuit conductors visit 300-3(a) and (b) exclusion.
In summary that which we have actually to date: For the 15 or 20 ampere circuit we can run a No. 12 copper this is certainly bare or green or green with more than one yellowish stripes on it’s own in order not to ever be at the mercy of real harm through the receptacle grounding terminal to your grounding electrode as described in 250-81 or, following the 1996 NEC is used, to virtually any available point in the grounding electrode grounding conductor . We could additionally work with a No. 10 aluminum gear grounding conductor with a few limitations present in 250-92(a). One limitation is where utilized outside aluminum grounding conductors is not set up within 18 ins of this planet.
Next, we’ve workmanship. Part 110-12 of this NEC requires that electric work be performed in a neat and manner that is workmanlike. You will find numerous various kinds of construction that it’s tough to provide any exact instructions about how to perform a neat and workmanlike work daf. This is when the experienced electrician has to guage for himself about how to result in the task look neat. This would require that the grounding conductor be concealed inside the residence or office for some jobs. This is accomplished in a few full instances by setting up it behind mop panels in grooves, by fishing inside of walls to a gap drilled when you look at the receptacle field, and also by stapling along cellar trusses. But each installation should be examined into the industry to guarantee that the finished task is and satisfies the consumer’s satisfaction.
There was one concern that remains. We titled this short article, ” How to Ground a Nongrounding-Type Receptacle.” But we actually did not inform you simple tips to do this. Anybody understands you cannot ground a nongrounding-type receptacle.