2. Disconnect appliances. The insulation resistance these tests should
be not less than 1. 14. for 230 and 400 installa-
tions.
2.Basic Electrical Installation Work
356
should disconnected, since they will respectively glow, charge be
damaged the test.70(b) and record the result. Remove all lamps. Remove all lamps. These are line and neutral conductors earth and between line
conductors.
To final circuits
L N
Tester
(a)
FIGURE 14.0MΩ 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. important make polarity
test the installation since visual inspection will only indicate conduc-
tor identification.
4.
4. Test between line and neutral conductors every distribution circuit
at the consumer’s unit shown Fig. The procedures are:
Phase and neutral conductors earth
1. 14. Close all switches and circuit breakers.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.
To final circuits
L N
Tester
(b)
. these cases each circuit
should separately tested obtain reading greater than 2MΩ.3.
The insulation resistance readings for each test must not less than
1.
3.e.
Although insulation resistance reading 1.0MΩ (IEE Regulation 612. 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. live and neutral conductors connected together) and the earthing
arrangements may made.
4 Testing polarity (612. Close all switches and circuit breakers.
Where the circuit includes electronic equipment which might damaged
by the insulation resistance test, measurement between all live conduc-
tors (i. Disconnect appliances.3).
Between line conductors
1.70
Insulation resistance test.c.2).0MΩ for satisfactory result (IEE Regulation 612.
There are two tests carried out using insulation resistance tester
which must have test voltage 500 d.
3.3.70(a). Record the results a
schedule test results such that given Appendix the IEE
Regulations
