Is this 2 phase incomer?

[cadspark]

Is this a 2 phase supply in this picture? The two 25mm tails connect into a 3 phase switch fuse unit into just 2 of the fuses. SWA is run from this unit to a seperate building housing a water heater for an outdoor swimming pool. The heater is on a 3 pole circuit breaker with the swa connected to 2 of the poles and these both bridge accross to the 3 pole. The 3 pole output is then combined in a henley block and taken to the heater in 25mm tail.

 

[sparks_114]

I am not sure how it would be as there is only one cut out fuse. Perhaps it used to feed two premises/locations and has subsequently been changed to feed one.

 

[sparks_114]

I can see the meter is polyphase, is there another cut out fuse?

 

[Deleted member 26818]

It's a dual tariff meter.

 

[sparks_114]

It's a dual tariff meter.

I knew it! Thanks spin.

 

[cadspark]

There is only the one cutout fuse visible but I don't know what is in the grey box below which is DNO kit and I wondered what the unit is where the 2 tails come out of before going to the henleys.

 

[Engineer54]

From the photo's, it looks as if they have taken 2 phases from a 3 phase head. The cut out fuse you can see, is probably not a supply cut out fuse, as it looks to me, to be a supply to the CT that the 2 phases are passing through...

The cut out fuses will be located within the head, and not seen in the photo's...

 

[Engineer54]

My mistake i think, ...a single CT can only sense 1 phase, so this could well be a single phase dual fed /split supply....

 

[sparks_114]

My mistake i think, ...a single CT can only sense 1 phase, so this could well be a single phase dual fed /split supply....

Your word's the gospel to me, please get it right!

 

[cadspark]

Could be heating the pool overnight on E7 as the pool heater is only single phase.

 

[Deleted member 26818]

Could be heating the pool overnight on E7 as the pool heater is only single phase.

They can afford a pool, but not someone to dust the cob webs?

 

[cadspark]

They can afford a pool, but not someone to dust the cob webs?

It's quite a sad state of affairs. The whole place is run down and the pool is empty. Chap has been divorced for a few years and he's let everything go.

 

[Deleted member 26818]

He doesn't live out in Essex near Stondon Massey by any chance?

 

[IQ Electrical]

If it's a 'split phase' system, you'll have around 480V between 'phases'.

If it's a genuine 2-phase system then you'll have the usual around 400V between phases.

 

[Deleted member 26818]

If it's a 'split phase' system, you'll have around 480V between 'phases'.

If it's a genuine 2-phase system then you'll have the usual around 400V between phases.

Ah the new 2 phase 3 wire, as defined in the amendment.
Anyway, I'm certain that if you look closely at the pictures and zoom in, you will be able to read the instructions for the display.
It will tell you how to view the readings for both the peak and the off peak.

 

[UKMeterman]

Hi,
There is only 1 current transformer and there appeares to be a single voltage fuse. This looks like a high current single phase, but use a voltmeter to be sure.

 

[Engineer54]

You've been reading my post then...lol!!

 

[cadspark]

Been back today to do some work not related to this cutout but had a look as I was there. It is single phase 230v. Its feeding a distribution board for a swimming pool which has a 16kw single phase heater on it.

How common are these high current single phase set ups?