Mcb or rcbo ?

[devonsparky]

I always get different views on this one.

I'm wiring a shop (commercial premises) and have done the install in conduit and through p-clips above the ceiling tiles.

My understanding of the regs is that all TN systems must meet 0.4s disconnection times. (Table 41.1)

Any of you guys got any input on this one?

 

[D Skelton]

It's not my argument, the interpretation of an "Instructed Person" is written in statute law.

Where is this written down in statute?

By the way, I wasn't getting irate, just fancied some debate, am I allowed to do that or am I being arrogant and stuck up??

Debate is good, but you cannot debate facts, which is what you present your point of view to be, you can only debate opinions. And I never said you were being arrogant or stuck up

 

[Jonny66]

Well put D Skelton....my mistake, not the interpretation of "Instructed Persons", but that employees have a duty of care to instruct their employees EAWR 1989....
Sorry will come back to this tomorrow, my lift has arrived, Ipswich here I come.

 

[bartkusal]

Then by your argument, every employee in every shop, office, school, library, police station etc..... every employee in every business or establishment where there are sockets that exist without RCD protection is an instructed person. IMHO, that is not the case. No matter how much training is given to a shelf stacker on how to use a non RCD protected socket outlet, it still doesn't make them an instructed person.

BS7671 defines an instructed person as "A person adequately advised or supervised by skilled persons to enable him/her to avoid dangers which electricity may create."

My interpretation of this would be permanently employed maintenance staff in large commercial or industrial premesis. Not electricians but have enough knowledge to know how to complete simple electrical tasks and know what is involved with more complicated electrical tasks that electricians would carry out. Also, over the years thay would have worked alongside numurous electricians and at least been passed some technical knowhow, but just not enough to make them skilled.

I guess at the end of the day, how this particular description is interpreted is down to the individual. In which case, there's no point getting irate about another persons interpretation because all we can have on this matter is an opinion. There are no facts to go by.

Absolutely...

 

[Brightspark2]

It's not my argument, the interpretation of an "Instructed Person" is written in statute law.

The regulation's refers to skilled or instructed persons which is defined in part 2 of BS7671. It doesnt say an instructed person as defined in the statue law you mention (although I dont know what statue law that is??)....

Prohibiting the use of personal equipment does not class as them as an instructed person, they can still plug in and use spar owned equipment.

 

[bartkusal]

Well put D Skelton....my mistake, not the interpretation of "Instructed Persons", but that employees have a duty of care to instruct their employees EAWR 1989....
Sorry will come back to this tomorrow, my lift has arrived, Ipswich here I come.

That’s it, I knew something is not right here it looked like you had a go at me for me saying that 1 h. has 60 min and you proving to me that it has 3600 s. I was with you in the post 19 100%, just could not understand what you was on about that statute law thing afterwards.
Absolutely, employers have a duty of care to instruct their employees, EAWR1989.

Have a nice ride to Ipswich