Discussion
State the true/false of the following statements as applicable for domestic electrical wiring.
A. The height of the energy meter should be higher than that of switchboard and 1.75 m above the floor.
B. Each sub circuit, consisting of 800 watts load is to be protected by its individual fuse or MCB installed in the distribution switchboard.
Answer: A
The official key marks both statements as true. Statement B matches the usual rule for domestic wiring that a sub-circuit should not carry more than about 800 W of load, and that each sub-circuit is protected by its own fuse or miniature circuit breaker at the distribution board, so that a fault on one circuit does not put the whole installation out. Statement A concerns the mounting height of the energy meter, a figure of 1.75 m above the floor, with the meter placed above the switchboard. I have not been able to verify the exact height in a published code, so this explanation follows the key. The options saying both are false, or only one is true, are rejected by the key.
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