0MΩ (IEE Regulation 612. 14. The procedures are:
Phase and neutral conductors earth
1. Close all switches and circuit breakers.70(b) and record the result.
4. these cases each circuit
should separately tested obtain reading greater than 2MΩ.
To final circuits
L N
Tester
(a)
FIGURE 14. important make polarity
test the installation since visual inspection will only indicate conduc-
tor identification.
3. Remove all lamps.
3. Test separately between the line conductor and earth, and between
the neutral conductor and earth, for every distribution circuit the
consumer’s unit shown Fig.
To final circuits
L N
Tester
(b)
.3. for 230 and 400 installa-
tions.
The insulation resistance readings for each test must not less than
1. Close all switches and circuit breakers. Disconnect appliances.e. 14.Basic Electrical Installation Work
356
should disconnected, since they will respectively glow, charge be
damaged the test. live and neutral conductors connected together) and the earthing
arrangements may made. Remove all lamps. These are line and neutral conductors earth and between line
conductors.70(a).0MΩ complies with the
Regulations, the IEE Guidance Notes tell that much higher values than
this can expected and that reading less than 2MΩ might indicate a
latent but not yet visible fault the installation.3. Record the results a
schedule test results such that given Appendix the IEE
Regulations.
Between line conductors
1. Disconnect appliances.
There are two tests carried out using insulation resistance tester
which must have test voltage 500 d.
2.0MΩ for satisfactory result (IEE Regulation 612. Test between line and neutral conductors every distribution circuit
at the consumer’s unit shown Fig.
Where the circuit includes electronic equipment which might damaged
by the insulation resistance test, measurement between all live conduc-
tors (i.3).70
Insulation resistance test.6)
The object this test verify that all fuses, circuit breakers and switches
are connected the line live conductor only, and that all socket outlets
are correctly wired and Edison screw-type lampholders have the centre
contact connected the live conductor.
4. The insulation resistance these tests should
be not less than 1.
4 Testing polarity (612.
Although insulation resistance reading 1.2).c.
2
