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3D Printer Fire protection

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janoc:

--- Quote from: paulca on October 16, 2019, 07:05:53 am ---100 points for safety, 1 for practicality.

However what I intend to do is put smart switches on plugs. 

--- End quote ---

And instead of potentially getting a fire from e.g. a TV you will get one from a crappy cheap remote controlled plug that has failed. Never mind the "fun" when some interference will prevent you from turning your lights on (had this happen with a cheap kit like this!).

If you really want to do this for safety reasons (and not just because you want to turn stuff on and off with your phone), have a second set of wiring for the non-essential stuff installed, separately fused and just pop the breaker when leaving. Yes, more expensive than a bunch of $5 "smart switches" and not as fancy as clicking stuff on your phone but actually adding some safety for a change instead of reducing it.

Monkeh:

--- Quote from: janoc on October 16, 2019, 07:36:15 pm ---If you really want to do this for safety reasons (and not just because you want to turn stuff on and off with your phone), have a second set of wiring for the non-essential stuff installed, separately fused and just pop the breaker when leaving. Yes, more expensive than a bunch of $5 "smart switches" and not as fancy as clicking stuff on your phone but actually adding some safety for a change instead of reducing it.

--- End quote ---

Breakers are not functional switches. Please do not do this.

janoc:

--- Quote from: Monkeh on October 16, 2019, 07:37:23 pm ---
--- Quote from: janoc on October 16, 2019, 07:36:15 pm ---If you really want to do this for safety reasons (and not just because you want to turn stuff on and off with your phone), have a second set of wiring for the non-essential stuff installed, separately fused and just pop the breaker when leaving. Yes, more expensive than a bunch of $5 "smart switches" and not as fancy as clicking stuff on your phone but actually adding some safety for a change instead of reducing it.

--- End quote ---

Breakers are not functional switches. Please do not do this.

--- End quote ---

OK, install a proper isolation switch. Even that breaker is still better than those cheapo "smart switches"/plugs.

themadhippy:

--- Quote ---Breakers are not functional switches
--- End quote ---
unless the 18th edition has changed the goal posts again,an mcb is allowed as a functional switch,fuses  and links are not.

Monkeh:

--- Quote from: themadhippy on October 16, 2019, 08:25:50 pm ---
--- Quote ---Breakers are not functional switches
--- End quote ---
unless the 18th edition has changed the goal posts again,an mcb is allowed as a functional switch,fuses  and links are not.

--- End quote ---

The good book sayeth:

--- Quote ---(5) Circuit-breakers and RCDs are primarily circuit protective devices and, as such, they are not intended for frequent load
switching. Infrequent switching of circuit-breakers on-load is admissible for the purposes of isolation or emergency switching.
For a more frequent duty, the number of operations and load characteristics according to the manufacturer's instructions should
be taken into account or an alternative device from those listed as suitable for functional switching in Table 537.4 should be
employed.
--- End quote ---

So in general, no, an MCB, RCBO, RCB, or other protective device is not suitable for use as a functional switch by BS7671.

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