Basic Electrical Installation Work

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This test also verifies the polarity each socket outlet.2 Test Ohmmeter connected to Ohmmeter readings This gives value for Step and r1 N1 and N2 E1 and r2 Step Live and neutral at each socket Step Live and earth at each socket R1 R2 As check (R1 R2) value should equal r2/4 L1 N2 Ohm- meter L2 L1 N2 N1 E2 E1 Ohm- meter FIGURE 14. The protective conductor reading will 1. End-to-end live and neutral con- ductor readings should approximately the same (i. Step 1 Measure the resistance the phase conductors (L1 and L2), the neutral conductors (N1 and N2) and the protective conductors (E1 and E2) the mains position shown Fig. more precise result indicated the earth fault loop impedance test which is carried out later the sequence tests.67 times as great these readings 2.2. .5mm cable used. Each reading should have value approximately Table 14. There are three steps this test. ohmmeter reading should then taken between live and neutral every socket outlet the ring circuit.2. 14.05Ω) the ring continuous. Step 2 The live and neutral conductors should now temporarily joined together as shown Fig. The test made with the supply disconnected, using ohmmeter as follows: Disconnect and separate the conductors both legs the ring the main fuse. The readings obtained should substantially the same, provided that there are breaks mul- tiple loops the ring.68.6Ω. 14.2 The object the test ensure that all ring circuit cables are continu- ous around the ring, that is, that there are breaks and interconnec- tions the ring and that all connections are electrically and mechanically sound. 2 Testing for continuity ring final circuit conductors 612. within 0. Therefore, this case, a satisfactory test result would obtained the resistance the protective conductor was about 0.Basic Electrical Installation Work 354 The protective conductor resistance values calculated this method can only an approximation since the length the CPC can only estimated.13.13 Table Which May Used Record the Readings Taken When Carrying Out the Continuity Ring Final Circuit Conductors Tests According IEE Regulation 612.e.67. Record the results a table such that shown Table 14.5/1.67 Step test: measuring the resistance phase, neutral and protective conductors