10 Popular Electrical Wiring Residential 17Th Edition Answer, Chapter 4 Solutions
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Electrical Wiring Residential 17Th Edition Answer, Chapter 4 - 39 8.2.Four earth electrode resistance check i. To test the earth electrode resistance. Ii. To examine the suitability of the place of the electrode. Iii. To make sure that the electrode is not buried inside the resistance region of some other electrode. Iv. Test gadget earth resistance tester. V. Test technique: - terminal e is connected to the electrode to be tested (green conductor) terminal p is attached to the ability spike (yellow conductor) at a distance of 10 meters from the earth electrode. Terminal c is attached to the contemporary spike (pink conductor) at a distance of 20 meters from the earth electrode. E p.C test system electrode 10 meter 10 meter discern eight.6 earth electrode resistance dimension 38.
34 b) final ring circuit conductor continuity test to make sure that every one conductors across the ring circuit have continuity; take a look at system multimeter (ohm range) or ohm meter take a look at approach: disconnect both the supply supply stay conductors from the mcb, the impartial conductor from the impartial terminals and the earth conductor from the earth terminal inside the distribution fuse container; join the check leads as inside the determine 8.2 (e- e); repeat the method for (l-l) and (n-n); the meter studying price will be less than 1 ohm. E n l disconnect each the supply source cables from mcb/fuse e n l ohm meter take readings at earth conductors of each resources and observe resistance readings discern very last ring circuit conductor continuity test 33.
Eleven three.3 capabilities of electrical wiring electrical wiring composes of electrical system inclusive of cables, switch boards, foremost switches, miniature circuit breakers (mcb) or fuses, residual current devices (rcd), lighting points, strength factors, lightning arrestors, etc.. Instance 1 of a unmarried phase patron electrical wiring is as shown in parent three.2 supply from licensee reduce out unit & impartial link (licensee) m meter major switch 40a / 60a rcd 40a or 63a double pole (100ma) circuit breaker/fuse 20a 20a 20a 110 ma k3 k4 k1 k2 k5 2x1.5mm 2 %/percent 2x4 mm 2 p.C/% mild/fan mild/fan bell/alarm water heater with double pole switch air conditioner with double pole switch spare lights/preferred energy circuits rcd 40a double pole (30ma) 1 20a 32a 32a k6 k7 k8 k9 1 no 13a s/s/o 2 no 13a s/s/o four no 13a s/s/o 6 no 13a s/s/o 2x2.5mm 2 %/% power circuits (socket stores) 2x4mm 2 p.C/% figure 3.2: example 1 of a unmarried section client electric wiring 10.