18th edition question

[cliffed]

Had these on the 18 th exam,confused me a bit.
What’s the maximum Rcd that can be used ,when an Earth electrode Reading is 2 ohms.
100 ma
300 ma
30 ma.
What would you say is the answer.

 

[Nigel]

Had these on the 18 th exam,confused me a bit.
What’s the maximum Rcd that can be used ,when an Earth electrode Reading is 2 ohms.
100 ma
300 ma
30 ma.
What would you say is the answer.

Given the options I would say 300mA as that is the closest option to 20A.

However there are four options and you have only given us three.

 

[Ffoeguk]

Table 53.1 page 156
Gives the answer to the question