Question

Q1 switching is done.
1. in switch board:
only phase.
2. in main switch:
both phase and netural
3. in mcbs of db
only phase
4. in rccb/elcb:
both phase and neutral.

Note: Never cut the neutral alone,it must be switched off simultaniously with the phase​

Answer 1

Answer:

I think the answer is 3. in mcbs of db only phase

Answer 2

3. in mcbs of db only phase