Standard for Electrical Installation?
BS3036 Semi-Enclosed Rewirable Fuse should they be banned MCB or RCBO vs Rewirable fuse?
MCBs will not allow you to re-activate a faulty circuit, the most you get is a humming noise for the brief period you are holding it in, BUT REWIREABLES WILL REACTIVATE THE CIRCUIT AND major disadvantage was that the incorrect fuse wire can be fitted!
So don't refit a fuse to a faulty circuit! otherwise flash-bang in your hand. Not such a good thing for a non-electrician, or anybody else for that matter
However, rewireables are not so sensitive to a lamp blowing which, I suppose, reduces the inconvenience of resetting the MCB.
What do you think of not conforming with current standards?
... adding to existing installation with no means of RCD protection?
...alarm systems should not be RCD-protected?
Residual Current Device
A Residual Current Device, or residual-current circuit breaker, is a device that instantly breaks an electric circuit to prevent serious harm from an ongoing electric shock.
Combined RCD+MCB is known as a RCBO
The new requirements for RCDs do not affect most existing installations unless they are rewired, the distribution board is changed, a new circuit is installed, or alterations are made such as additional socket outlets or new cables buried in walls.
Residual-current Circuit Breaker with Overcurrent protection
RCBO PROTECT AGAINST overcurrent (overload) or short circuits AND are equipped with an auxiliary connection wire that must be connected to the earth busbar of the distribution board. This either enables the device to detect the missing neutral of the supply, causing the device to trip, or provides an alternative supply path for the tripping circuitry, enabling it to continue to function normally in the absence of the supply neutral.