Did any one else go? Is there any upset Wigan fans this morning lol. Any Rhinos fans with a stinking hangover :wacko:
What a great game, one for the history books with Leeds winning all 3 competitions. All we have to do now is beat the Four Nations Champions New Zealand in a couple of weeks...
Hi I've got a question regarding volt drop.
When calculating volt drop to a 3 phase distribution board do I use 230v (11.5v) or 400v (20v)
The board I'm attempting to put a cable to is 75 meters away.
Design current 100A
From TABLE 4D4A Cable selected = 25 mm²
For 25 mm²: mV/A/m 1.75 for 230v...
Hi all :).
Seeing alot of cases where I have seen 20A DP switches in a kitchen (for example) each feeding a radial 2.5t&e to each white goods appilance or similar, and the 20A DP switch primarys are fed from the 32A kitchen ring final circuits - Is this accepteble to BS7671?
I'm guessing...
Afternoon, here's the proposed setup I am planning to supply 9 off 600w IR heating panels from a ring final circuit
the installation is commercial and the panels will be fitted to a suspended ceiling
a contractor and thermostat will control the heaters
the circuit is fed from a 32a rcbo
in...
As doing a cu change ,I have a ring final in a house with an end to end reading on r1-r2-Rn are so low that somewhere very close under a floorboard the ring must have been connected together somewhere, customer refused to pay more, so i have put in a 20amp mcb. To comply with current rating of a...
Hi I have just looked at a friends place and she asked for a test on the CU as she thought it looked tatty ! It is, ran first ring o.k. Next ring seems to run zig zag fashion up & downstairs and to random outlets like a drunk wired it in ! Problem came when testing end to end I got r1 > 2000...
Eh up :)
I'm trying to challenge myself with scenarios where I'm not sure if my interpretation of the calculation rules + regs is correct or not.
RFCs are doing my head in.
I think I understand most of the theory:
- 433.1.204 lists a specific case where a RFC protected by a 30/32A protective...
Hiya
From a 3 phase board i have pulled a submain in to feed a 6 way single phase board and wired my final circuits from there.
But i have also wired a single radial to feed a socket from the 3 phase board via a rcbo.
How do you cater for this lot on test sheets?
Would you do a...
why do people use a ring circuit? i understand that the cable for example 2.5mm twin and earth can carry more current in theory another reason i can think of dont know if its why is the circuit may require a heavy use of socket outlets e.g an office using computers etc... but what other reasons...
I recently read an article about the advantages of both the RFC and Radial circuits, after which I must admit that I am more swayed towards the Radial.
What are others thoughts? What do you prefer and why?
Hi,
a recent PIR has picked up no RCD protection and no supplemantry bonding to pipe work.
Am i correct in saying if all circuits to bathroom are protected by RCD then supplementary bonding is not required?
... Polys 2 - Monos 6
Amazing scenes this lunchtime in Yorkshire !!
I just had to stop the car and take a photo.
There were no optimisers or micros on the rails but plenty of dangling cables.
I wonder what the householder was quoted for. Why not fit some more to the left of the chimney?
No...
Been reading up for my 2394/5 exams next week. Learnt some interesting stuff over the last few days. Thought I'd pose a simple quiz, as this was something that I misunderstood, and I'd be interested to find out if others do too (or if it was just me!) :) Just for fun, trainees and mentors can...
Eh up :)
Someone tell me where I'm going wrong.
I'm reading up on testing theory, using GN3 (6th edition, incorporating Amd 1, 2012). Section 2.7.7, pp40-41.
"Simple installations that contain no dist. ccts should pref be tested as a whole, see fig 2.4a."
"Test should be carried out with...
Trying to calculate the voltage drop for a run on external lights supplied via 5Amp Fused/rcd spur from local ring final circuit. for a quotation and have got a bit confused re Voltage drop.
27m run in 1.5mm cable total load on lighting radial 420w. (no diversity as all lights either on or...
Hey guys, I had a callout the other day, 7 fan coil units where not working, these where supplied via a ring final circuit and once all unplugged the circuit engaged, I latter discovered all fan coil units had a dead link between line and earth under a 250v insulation test. The manager and...
You have been asked to carry out a full test on a ring final circuit. It is wired in 2.5mm single core cables. (I have made the test result values up to make things easier to work out).
You have confirmed that the ring is continuous, and your r1 value is 0.5 ohm, your rn is 0.5 ohm and your r2...
On an EIC, be it with whoeverm but using a standard one, or that of niceic online, how or here would I write the details of a control circuit from a time switch to Contactor etc? Or dont you bother?
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