There are two different wiring configurations for a lamp and switch circuit:
Option A & Option B
In Option (A), the live (phase) wire is linked directly to the lamp, while the switch is located on the neutral line.
Conversely, Option (B) has the live wire pass via the switch before reaching the bulb, while the neutral wire is immediately attached.
While both circuits can turn the bulb on and off, Option (B) is the safer & more common technique for electrical wiring.
Switching the live wire guarantees that no current flows to the light when the switch is turned off, lowering the risk of electric shock.
Although the switch is turned off, the light maintains a live connection, providing a possible hazard during repair.
Electrical standards and safety rules often advise switching the live wire for added protection.
Even if the switch is turned off, someone who accidently touches the socket (or) wiring in Option (A) may be shocked.
Therefore, for safety and conformity with electrical standards, Option (B) is the ideal wiring method.
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