Although protection by fuses and circuit breakers as above is usually acceptable, under certain conditions even closer protection will be given by the use of earth leakage ... The use of an earth leakage circuit breaker of the voltage type would overcome this. ... two principal forms of earth leakage circuit breakers: voltage- operated or current-operated types. ... For a voltage-operated breaker to give fire protection, the metalwork that it is protecting must be completely isolated from earth.
|Title||:||Underdown's practical fire precautions|
|Author||:||Ronald Hirst, G. W. Underdown|
|Publisher||:||Gower Pub Co - 1989-01-01|