How are these different from an AFCI?

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mbrooke said:
How are these devices different from an AFCI starting at 1:25? They seem to do the same but are called something else:



https://www.youtube.com/watch?v=k5DcIf5-pbk
Click to expand...

They are GFI's.

Note the fault was from hot to ground, not hot to neutral. The device that was being discussed was basically a 300 ma GFI. The video was about the difference between a 30 ma RCCB (GFCI) and a 300 ma RCCB (GFI) and how even a 300 ma device could detect a fire if the conductive path was from hot to ground.

AFCI devices sense current signatures in the circuit even if the path is through the neutral.

Edit to add: I'll bet the voltage used to burn the wood in the video was higher than 240. Probably close to 1000.
 
K8MHZ said:
They are GFI's.

Note the fault was from hot to ground, not hot to neutral. The device that was being discussed was basically a 300 ma GFI. The video was about the difference between a 30 ma RCCB (GFCI) and a 300 ma RCCB (GFI) and how even a 300 ma device could detect a fire if the conductive path was from hot to ground.

AFCI devices sense current signatures in the circuit even if the path is through the neutral.
Click to expand...


Either way, Id take that over AFCIs.


Edit to add: I'll bet the voltage used to burn the wood in the video was higher than 240. Probably close to 1000.
Click to expand...

:D:thumbsup:
 
The reason for 300mA and 30mA RCD’s, is covered in BS7671and BS-EN61008

The wood igniting is an old trick and I’ve used it to get a capital expenditure budget for test equipment.
Dampen the wood and rub graphite powder in to the entire top surface, let it dry and give it a clean up. It looks like any other piece of wood, a bit darker maybe but it is conductive.
 
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