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Electrical Installation – ECX 4234

513344919

7
...
1 Visual Inspection


Check for obvious damage or defects in the accessories, connectors, plugs or extension outlet sockets
and for discoloration that may indicate exposure to heat, chemicals and moisture
...




Check that the inner cores of flexible supply cords are not exposed or twisted



Check that the external sheaths are not cut, abraded, twisted, or damaged to such an extent that the
insulation of the inner cores is visible



Check that unprotected conductors or insulation tape are not in evidence
...




Check that any operating controls are in good working order i
...
they are secure, aligned and
appropriately identified
...




Check that ventilation inlets and exhausts are unobstructed
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7
...
Earth Testing
Components: -

1
...
Necessary Rods
3
...
Then apply
the voltage to the rods
...
1 MΩ
...
Insulation Test
Components: -

1
...
Necessary Probes

Connect all the components as per the above figure and select the scale as Mega Ohms
...

Note: - Megger value should be less than 1
...


3
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Insualation Megger
2
...
Then short circuit all socket outlets and bulbs points and fan
points
...
Apply continuity tester probe between live and neutral conductors
Note: - Megger value should be 0 MΩ
...
Sequence Test
Components: -

1
...
Necessary incoming phases

Connect the brown, black and gray phases regularly at distribution board incoming point to
the sequence meter
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