The Scotland England difference

scotsparky · Jul 16, 2009

I known this may start a debate however its a good question.

I have just had a look at Mr Marks Sparks install in the "Show us your installs " tread and notice a difference. When i served my time in Scotland we had to put a lockring at every coupling,conduit joint. However i noticed mr MarkSparks had none on his conduit. Is this an English thing and if so why??

benji · Jul 21, 2009

Basically its the company you work for who decides what type of installation/materials that are used ,but if the test results don,t add up you,ll be putting an extra cpc in

yours benji

captainconduit · Jul 22, 2009

yes i work for a company but i order the materials and installation is designed by electrical designers who always air on the side of caution by uprating cpc size. Some people are not up for change and again test results are all within max values.

scotsparky · Jul 22, 2009

have you ever tested the conduit continuity captain?

captainconduit · Jul 27, 2009

Tested containment at various points of install and all results were under 1 ohm so ok . RCBO s installed on ring mains and many parrallel earths so all good. Containment i suppose is primarily for mechanical protection. scotty

Mac · Jul 27, 2009

When i did my apprenticeship in the 80's,i was taught that lockrings/locknuts were only used on runners and all the joints were painted with galvanised paint.

scotsparky · Jul 27, 2009

captainconduit said:
Tested containment at various points of install and all results were under 1 ohm so ok . RCBO s installed on ring mains and many parrallel earths so all good. Containment i suppose is primarily for mechanical protection. scotty

you suppose?? interesting answer On old PME systems the conduit /trunking was the earth a lot of those installations dont have RCDs so its vital you have a decent earth throught the metalwork, under 1 ohn isnt a very good reading there is it capain? it has to be a lo under near 0.05 ohms.

Dont rely on rcds as a get out for bad installs and desighn they are SUPPLIMENTARY fault protection.