Over The Years....

SUNRAY · 19 Nov 2020

securespark said:
The 4th Ed. (1903) has an interesting line:

Regulation 48 states “Fuses may be considered too large if they are not warm to the touch on full load and too small if they hiss when moistened.”

Fancy moistening any fuses??

Or touching them when on full load

SUNRAY · 19 Nov 2020

bernardgreen said:
Quoting from https://www.wiring-regulations.co.uk/wiring-regulations-history/

With the publication of the fifteenth edition it was decided that in future reprints of the same edition (amendments) would be contained in one of five different coloured covers red, green, yellow, blue and brown, a new edition would be published when the brown covered reprint required updating.

I wonder why they chose those colours and sequence when there is a perfectly valid international number colour code and subscribed to by IEE
1 = Brown,
2 = Red,
3 = Orange,
4 = Yellow,
5 = Green.
I can only think it's a throwback to old phase colours and a token harmonised.

SUNRAY · 19 Nov 2020

bernardgreen said:
Quoting from https://www.wiring-regulations.co.uk/wiring-regulations-history/

With the publication of the fifteenth edition it was decided that in future reprints of the same edition (amendments) would be contained in one of five different coloured covers red, green, yellow, blue and brown, a new edition would be published when the brown covered reprint required updating.

I wonder why they chose those colours and sequence when there is a perfectly valid international number colour code and subscribed to by IEE
1 = Brown,
2 = Red,
3 = Orange,
4 = Yellow,
5 = Green.
I can only think it's a throwback to old phase colours and a token harmonised.

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Over The Years....

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