To check all the components of the heater by dismantling the same

To contact the supplier / manufacturer for fault-finding chart

To use a megger for checking the insulation resistance

To check the voltage on the terminal box of the heater

To stand on a wooden stool or work bench

To use rubber blocks

To switch-off S. P. switch

To switch-off main supply

0.01 mega ohms

Not less than 0.5 mega ohms

1.0 kilo ohms

0.01 kilo ohms

The high short-circuit current could destroy the measuring instrument

The over current protection connected on the supply side will operate and disconnect the supply

Dangerous electric arcs may be produced because of high short-circuit voltage

The high short-circuit current may overload the supply source

radius of circle formed by its rotation

double the length of the blade

the distance from centre of motor to tip of the blade

double the distance from centre of motor to tip of the blade