BS7671 regulation 433.1.1

[sxdave]

In a quiet moment I am looking at something that has been in my mind for some time. Regulation 433.1.1 includes the phrase "The current (I2) causing effective operation of the protective device is given in the product standard or may be provided by the manufacturer" I assume that the product standard would be BS60898 for MCBs. If I am correct does anyone know what BS60898 says about I2 and/or effective operation?

 

[buzzlightyear]

The factor of 1.45 that is applied in Regulation 433.1.1 when considering overload protection assumes that the tabulated current-carrying capacities are based on an ambient air temperature of 30°C. To achieve the same degree of overload protection when the tabulated current carrying capacity is based on an ambient temperature of 20°C

I2 ≤ 1.45 Iz – The current (I2) causing effective operation of the protective device should not exceed 1.45 times the lowest current-carrying capacity (Iz) of any of the conductors of the circuit. Condition 1: In ≥ Ib

 

[littlespark]

Did you copy and paste that, buzz? ?

 

[buzzlightyear]

Did you copy and paste that, buzz, I'm not that fast ,thousand works a minute .lol.

 

[buzzlightyear]

Did you copy and paste that

where do you find wall paper paste on any pc. lol.

 

[pc1966]

where do you find wall paper paste on any pc. lol.

Next to the Tippex jar?