Maintence Free JBs (MFJBs)

[westward10]

Bit like people who run a strip of tape along all the breaker terminals, especially in triple-pole boards.

 

[Pete999]

Bit like people who run a strip of tape along all the breaker terminals, especially in triple-pole boards.

That's what they get taught on the Sparky courses

 

[Dave OCD]

I think we're starting to over think things that are second nature to any decent and competent sparks, in the end you can start to even doubt yourself.
I'm sure we've all come across hundreds of old screw terminal JBs in loft spaces and under floorboards, the vast majority if connected properly in the first place will still be perfectly ok with tight terminals etc.
As far as 'maintenance free' goes I'm happy to use the Ideal 'In sure' connectors in any suitable enclosure, often a small grey Schneider insulated enclosure. I'll secure the box with screws wherever possible and clip the cables and that will do fine for me, the only real advantage IMO is time saved especially in awkward areas, but I'll only use 32a rated connectors on RFCs just to give piece of mind.

 

[Richard Burns]

I think we're starting to over think things that are second nature to any decent and competent sparks, in the end you can start to even doubt yourself.
I'm sure we've all come across hundreds of old screw terminal JBs in loft spaces and under floorboards, the vast majority if connected properly in the first place will still be perfectly ok with tight terminals etc.
As far as 'maintenance free' goes I'm happy to use the Ideal 'In sure' connectors in any suitable enclosure, often a small grey Schneider insulated enclosure. I'll secure the box with screws wherever possible and clip the cables and that will do fine for me, the only real advantage IMO is time saved especially in awkward areas, but I'll only use 32a rated connectors on RFCs just to give piece of mind.

Remember that the MF testing (at least from wago) means that the current rating of the connectors needs to be derated for MF use. So a 32A connector will be derated to 20A, which is still fine for a RFC.

 

[happysteve]

Never understood why people wrap connectors in tape.

Probably adhering to the second half (if not the first!) of 134.1.1, prior to amendment 3...

 

[westward10]

Probably adhering to the second half (if not the first!) of 134.1.1, prior to amendment 3...

View attachment 33836

Disgraceful recommendations.

 

[richy3333]

Off topic slightly, but this is just a selection of the 48 JBs I took out of a rewire last year!

 

[Midwest]

Removing redundant wiring & joint boxes, you'll have the 'artifice police' after you

 

[Wilko]

Awright awright, I'll get some more appropriate sleeving and give up my baggy pants look

I found a fiver still in wallet and bought some "stove pipe pants" CPC sleeving and here 'tis on a MF RFC extension for CU move. Wago now giving sleeving guidance in the new box.

(well I thought it was funny ...)

 

[7029 dave]

Here's a fine pic of a 3X2.5mm jb - built from all MF marked or certified Wago bits. But the end result is not MF. That's cause I couldn't fit CPC into the end containment of the box. Ha. Only good thing was I worked it out before Inspector.

View attachment 33749

I do like the look of those MF, but J701 takes some beating so much moor room.

 

[7029 dave]

Trust me my J701's were MF.