Name of Wiring Test Instrument

Name of Wiring Test Instrument Points : name of wiring test instrument, continuity tester, polarity test, electrician’s test lamps, resistance bridge, megger 1. Continuity Tester
2. Polarity Test
3. Electrician’s Test Lamps
4. Resistance Bridge
5. Megger

Insulation Test

Insulation Test Points : Insulation Test, Wiring Test A thing installation after being completed must be tested for insulation resistance. Two tests should be made to ascertain. In first test the insulation resistance between the wiring and earth with all fuses and lamps in and all switches ON. In second test the insulation resistance between phases with all lamps out and all switches ON. The explanation of second test is described in short circuit test section, now here we only study the first test only.

Short Circuit Test

Short Circuit Test Points : Short Circuit Test The short circuit test should be made before the fans and lamps are installed; the test should he made with the fuses are inserted in distribution fuse board, all, switches ON, all lamps removed, all fans removed, all portable current carrying apparatus disconnected and the main switch closed.

Continuity Wiring Test for Earth Connection

Continuity Test for Earth Connection Points : Continuity Wiring Test for Earth Connection Another test that has to be taken on completion is to as certain the resistance from the farthest point of the conduit or cable sheathing to earth, which must not exceed (1Ω). Every earth continuity conductor must be checked to as certain that it is mechanically and eclectically continuous. The impedance of the earth-continuity conductor is sufficiently low to enable a satisfactory earth-fault current to pass to operate the protective devices.

Continuity Wiring Test

Continuity Wiring Test Points : Continuity Wiring Test Another lest that has to be taken on completion is to as certain the continuity of the circuit It is essential to reach the phase and neutral wires to each installed device in the wiring circuit. The procedure of this test is that all the lamps are out of circuit, disconnect the fans connection, all the switches are in OFF position and fuses are also out of circuit.

Polarity Wiring Test

Polarity Wiring Test Points : Polarity Wiring Test, Using Megger, Using continuity tester, Using test lamp A test has to be made to verification of polarity of all single pole switches, including switches on socket-outlets -and fuses are connected to phase wire and that there is no break in the conductors. For lighting circuit all the lamps, should be removed, the main switch is in ON position, all the fuses are connected in circuit and all the switches is in OFF position:

A.V.O Meter

A.V.O Meter Points : A.V.O Meter, Definition A.V.O Meter, Construction and Working of A.V.O Meter We can easily measure the A.C or D.C voltage, current and resistance by using a A.V.O meter. In this instrument all three electrical functions such as voltage, current and resistance are combined and therefore we can say it A.V.O meter. To using this meter we perform the polarity and continuity tests. For this purpose we use the ohmic scale.

Continuity Tester Testing Instruments

Continuity Tester Points :Definition Continuity Tester Testing Instruments, Construction and Working of Continuity Tester It is a simple testing instrument and constructed easily. In this instrument, we use a 3-volt or 6-volt battery, 3v or 6v lamp, a wooden box, lamp holder, connection leads and testing leads. We connect the lamp across battery. The lamp is fled into lamp holder and testing leads are connected to, outer, terminals of wooden box.