Changes in the 17th edition....

[LukeScotty]

Thought I'd start a sticky post on the 17th edition changes, basically just list of all the regs which have changed, be as detailed as you like really, hopefully it'll become a decent reference post for you look upon in the furture months before it comes into action. Type away...........

 

[Shakey]

shakey, have u got a pdf format of the regs ? wink wink ?

erm...no of course not......wink wink

 

[LukeScotty]

gimme gimme

 

[paulfish674@bt]

can any say if ashley joint boxs the brown backerlite ones are still allowed in installations

 

[Shakey]

can any say if ashley joint boxs the brown backerlite ones are still allowed in installations

well nothing has changed regarding junction boxes, the same rules apply, they must be accessible for maintenance and inspection etc etc

 

[bigal]

hi guys an gals
what's phase sequencing about?
big al

 

[spark-doctor]

hi guys an gals
what's phase sequencing about?
big al

In what context? A bit more Info please.

 

[Shakey]

hi guys an gals
what's phase sequencing about?
big al

presumably you mean the requirement to verify that the phase sequence is maintained?

dont know what level you are at (so i will assume you dont know)

in a three phase sytem, each phase is angularly 120 degrees apart. the order that these phases 'peak' in (their waveforms) is the phase sequence

in old money, this was conventionally Red-Yellow-Blue, or L1, L2 L3.

The requirement is to verify that if it starts in that order it should finish in that order, with the main problem of motors running in reverse DOR if it doesnt.

 

[bigal]

Thanks for getting back guys
Context is 2 fold: 1) PIR certificate askes for 'verification of phase sequence' What's the test process for this?. 2) reg 612.12: 'For multiphase circuits, it shall be verified that the phase sequence is maintained'? Is this a good enough explanation?
Cheers in anticipation of your replies.
big al

 

[Shakey]

Thanks for getting back guys
Context is 2 fold: 1) PIR certificate askes for 'verification of phase sequence' What's the test process for this?. 2) reg 612.12: 'For multiphase circuits, it shall be verified that the phase sequence is maintained'? Is this a good enough explanation?
Cheers in anticipation of your replies.
big al

common mis-conception Big Al, it says VERIFY, not test.

If i look at one end of a run of SWA,(for example)
and the conductors are labelled, and connected to L1, L2 and L3, and i look at the other end, and they are the same, then i have verified that the phase sequence is maintained. Of course you could do a live test (f you have phase sequence or phase rotation on your meter), you could also dead test (by doing R1+R2 checks on each relevanet phase) or just look as i have said

 

[Tapouchoke]

hi guys new mamber

just had ahalf day vistit with nic went well no departures ist over for 12months now glad found the fourum

tapout

 

[bigal]

Thanks Shakey
I was fearing it to be more complicated than it was.
I think I was just a little 'phased' by the sequence of events.
Cheers
bigal

 

[brook]

What do you have to do with your 16th edition testers??
I need to purchase one and the little man in the shop said that he had no 16th edition ones in stock and he was waiting for the 17thedition ones to come in.

---------
Brook

Sreevysh Corp

 

[andy pandy]

Re junction boxes, their is a regulation somwhere that says a tool is required to remove the lid. This outlaws the old jb`s with the lids that screw on whith out screws.

 

[spark-doctor]

I know of no regulation that says a JB requires a tool to open it

The new JB from Hager just snap close

 

[professional]

The 17th Ed requires you to verify the phase rotation (or sequence) on the part of the system upon which you are working. Newer testers have this facility BUT voltage testers are already available that have this facility built in (albeit a cut down version) for about £30-£40 so don`t ditch your 16th Ed test equipment, there`s nothing wrong with it, just buy a small tester for the odd occasion you need to work on three phase.


If anyone`s interested I can sell them a single phase rotation tester for £200.