⟩ What is backup Generators?
Used for fulfilling emergency load requirement during sudden shortage of power.
Used for fulfilling emergency load requirement during sudden shortage of power.
When carrying out maintenance work on a distribution board in a busy walkway, it is advisable to protect others by the use of a
Four resistors having values of 2 O, 2 O, 5 O, and 20 O are connected in a parallel circuit arrangement. The total resistance of this circuit is
A circuit wired in 1.5 mm2 thermoplastic (PVC) twin with CPC cable is protected by a 16 A device and is used to supply a 230 V 3 kW water heater. If the cable has a rated voltage drop of 29 mV/A/m and the circuit is 24 m long, the actual voltage drop will be
A non-maintained emergency light is classified as NM3. This means that the luminary will illuminate during
An earthing arrangement that has a PEN conductor is
A residual current device will disconnect under
The most suitable item of equipment to mark a straight line in order to install a horizontal conduit over a distance of 4 m is a
A 50 mm x 50 mm steel trunking has a tabulated space factor of 1037. If the tabulated factor for PVC cable having a cross sectional area of 6 mm2 is 21.2, the maximum number of these cables that can be installed into the trunking is
The four electrical tests that should be carried out on a new ring final circuit before it is energized are
Certain discharge luminaries mounted above rotating machine can give the appearance that the machine is at a standstill. This effect is known as