Crimp connectors used for mains cables - is this allowed?

[RigidRaider]

Synchrono motor on our CH/HW is playing up so I plan to replace it with new. However when I pulled the wiring out from the trunking I found this:

Is this allowed? Can I just remove the crimped connectors and use a 15A terminal block for ease of changing the motor in future? Is there a better solution like a connector that can be pulled apart?

 

[EFLImpudence]

Is this allowed?

Yes. That's their purpose.

Can I just remove the crimped connectors and use a 15A terminal block for ease of changing the motor in future?

Why not wait until the future?

Is there a better solution like a connector that can be pulled apart?

Why?

 

[JohnW2]

Is there a better solution like a connector that can be pulled apart?

That wouldn't really help you very much - if/when you have to replace the motor in the future, the new one won't come with an appropriate 'connector' attached!

Kind Regards, John

 

[333rocky333]

Im taking it that he wants to fit the motor NOW using something that would also benefit the future.

Most 5 pin plugs reguire a special tool to fit

I would ptrefer crimps in the trunking than connecter blocks ( providing you have a crimping tool), a better plan is a box mounted beside the trunking with connecter blocks inside and a blank cover

 

[kai]

Example of bad pump motor design, the terminals should be user-accessible, and NOT hermetically sealed in with a dangling fly-lead.

 

[JohnD]

IIRC the flex to a grundfos pump goes through a plastic gland into a rectangular box, and you can unscrew the lid and change the flex if you feel the need.

http://www.plumbase.co.uk/grundfos-ups2-ph5060-gb-pump-5411-2229125

It is quite common to have the cables connected in a junction box (or "wiring centre") as plumbers like to call it.

http://www.plumbase.co.uk/search?w=wiring+centre

However I don't recall the pumps having a 5-core flex. It more likely goes to a 3-port valve, which does.

http://www.screwfix.com/p/honeywell-v4073a-3-port-motorised-valve/31421

going to the motor and switch contacts inside the rectangular box

 

[JohnW2]

Im taking it that he wants to fit the motor NOW using something that would also benefit the future.

Indeed - but, as I said, any new pump he wants to fit in the future won't come with a suitable mating connector fitted, so he'd probably have as much work to do (when installing a new pump) if he installed a plug/socket now as if he didn't!

Kind Regards, John

 

[RigidRaider]

Sorry - I can see that I've misled most of you by including the circulator in the picture. It's nothing to do with the circulator, it's the wiring to the synchrono motor in the 3 port valve.

I want to change the motor and am wondering if there's a better and more user-friendly way of doing the connection.

 

[JohnD]

if you can afford £13, get a "wiring centre." It is normal practice.

You can put the pump and thermostat through it if they ever need changing (typical life is 20 years)

For typical connection, see (page 2) of the instructions. Other brands will be similar.

http://www.plumbase.co.uk/link/1/h034545_436_t.pdf

 

[JohnW2]

Sorry - I can see that I've misled most of you by including the circulator in the picture. It's nothing to do with the circulator, it's the wiring to the synchrono motor in the 3 port valve.

Nothing I've said is dependent upon what's connected to the cable. You obviously won't get a new synchro motor which comes with a appropriate fitted 'plug-in connector' any more than you would find a circulating pump with one!

Kind Regards, John

 

[EFLImpudence]

You don't need to do anything to the cable to change the synchronous motor,

 

[RigidRaider]

Er..... explain please? Can the motor be removed from the gearbox and chassis?

Eedit: dammit, just checked and yes it can.... come to think of it, I think I knew that a few years ago but had forgotten because one doesn't do these things very often!

The little plastic plug on the blue wires isn't easy to pull out from the motor though - presumably it just needs a good wiggle and some persuasion?

 

[EFLImpudence]

Yes, you can buy the motors separately.
Most are the same - make sure.

Search Toolstation for 68222.
When I post the link a picture of a nut appears.


What is the problem, exactly? Sometimes the valve, itself, becomes sticky.

 

[EFLImpudence]

Try this
http://www.screwfix.com/p/drayton-s...rch-_-SearchRec-_-Area1&_requestid=318358#_=p

 

[RigidRaider]

No, the valve is fine; I know because I changed it a couple of years ago when it started clonking on changeover. For the same wiring reason I just retained the old motor head and refitted it to the new valve, which is why I've got a brand new motor head spare.