Deviating From Bs7671

[kerching]

On the topic of SY cable, I was once informed that SY cable does not conform to a BS standard only an EN standard so is that maybe why current ratings are not available in 7671? It is also to my understanding that the steel braid in SY cable offers very little mechanical protection and only serves the purpose of a screen, which leads me to another question, an SY gland connects the braid at both ends effectively forming an earthed sheath, however on the boats I work on any screening on cables is to be connected at one end only and the other end left open to avoid any current flowing along the screen, anyone have a my thoughts on this?

Circulating Earth currents?

Same way as you should be careful,with screened data cable

Just saying

 

[binky]

not if you earth the braid?

 

[Essex1]

i thought sockets within 3M was buiding regulations which is something we are not ment to deveate from.

I fitted a commando socket for a hot tub within the distance to the hot tubs suposid location. As it was not delivered yet, and the owner assured me he was going to build an enclosure around the socket i did not see any problem.

The building regs do stipulate that 7671 must be adhered to so in effect BS7671 is law in that effect IMO.

 

[steptoe]

But, as I previously pointed out,

BS7671 permits deviations, so you are still complying with 7671 even if you deviate from it. 

 

[ProDave]

But, as I previously pointed out,

BS7671 permits deviations, so you are still complying with 7671 even if you deviate from it. 

Irrelevant really.  Your building control officer knows jack about electrics. All he wants is an EIC saying it complies with 7671 (with or without deviations) and he is a happy man.