Is the junction box soon to be a thing of the past?

the proper way is to secure all the cables that enter the JB with a cable clip and secure the JB to a surface, but this is never adhered to.

 

Also it's quite hard to get the top surface to be ip4x if you mount them on walls. I've pretty much stoped using them now.

 

Wagos are good and easy but they do have derated values, to take into consideration.

 

I n some situations the JB is still acceptable.
However there are many situations where it isn't.

 

When I was a college the tutor showed us a tip. To take of a spur fron a ring for instance the outer sheath of t&e could be carefully remove to 4". Then remove the inner sheath of L and N to about 10mm.

The result is that the cable dosent need to be cut. Simply remove all the brass screws from jb and insert the cable plus the spur. Useful if there isnt any slack on existing cable.

 

Hi Jitender. Must say I have used the above technique - the only thing I can add is that I sliced some earth sleeving and put it over the bare cpc in the jb - very small tie wraps hold it neatly in place. Green/yellow insulating tape could be used I suppose, but it looks bodgy, and goes gammy and stuff.

 

Yes that can be a good way of doing it, I never thought of slitting the earth sleeving JP, another good idea!

 

The tutor said it was fine to leave the cpc unsleeved in this scenario.

 

That doesn't make much sense. Its still an exposed cpc that should be marked correctly but hey ho

 

I think it used to be commonpractice to run the CPC around the outside of the JB and just twist all together.

 

Yes snag 17.

 

Yes, I've seen lots like that in older installations Spin.

 

JB's will be around for a long time yet at less than a Quid a pop.

U won't get 3/4 Wago's and an enclosure for less than a Quid will ya!

 

Wagos are brilliant - the only thing to remember is Frog is the ratings, 222's up to 32amp and 773's 24amp.

I used the wrong ones when I modified my extension wiring due to a change of plan (instead of kitchen it is now a living room) I used 773's on the ring and then found out they were only rated at 24amps (I should have used 222's rated at 32amp) the rating is written on the box flipping heck. I dropped the breaker to a 20 and this covers things - in my case there are no high load items on the ring so no probs, if there was a loading prob then a little bit of messing about would result in 2 x 20amp radials but this was not necessary.

I have just used them in a multi gang switch box (nice deep back box) and they are really really good.

Incidentally with the Wago's fitted no anomalies manifested themselves with ref to final continuity test etc.

 

24 amps would be ok on a ring circuit JP, remember each leg only carries 16 amps, possibly a bit more if the ring is a bit unbalanced of course but not that much more.

 

As for ''is the jb going to be a thing of the past'' - then maybe it will be one day because Wagos in cable clamped box are fantastic tbqh - you don't have to use Wago boxes you can use things like Gripboxes, these are a really excellent box.