Interesting stuff from old Ed's of the Regs.

[securespark]

Have my nose stuck in old Regs again. Just fascinated by how things have altered over the years: a bit like looking at an A-Z map of your area from the early 60's!

First one from the red OSG (not this Ed., but the last one!):


(Re TT supplies)

The recommended maximum value of the EFLI is 220 Ohms.

And this one from the 14th:

D24. A current-operated earth-leakage circuit breaker shall be used only where the product of its operating current in amperes and the earth-loop impedance in ohms does not exceed 40. Where such a circuit breaker is used, the consumer's earth terminal shall be connected to a suitable earth electrode.

 

[jockspark]

i think i have read my copy of the 14th more in the last few months than i did when it was relevant.
like you secure i think of a new reg and think
what was required way back when

 

[securespark]

Yup!

I had forgotten that the max. loop for TT had been higher than the now-recommended 200 ohms.

Also, I never knew of the ELCB reg with regard to the figure 40. Limiting the product to this means a maximum EFLI of 1333 ohms.

Further, the next reg. says, "A voltage-operated ELCB is suitable for use where the ELI exceeds the values admissible for conformity with Reg. D.24.

I've found another interesting reg. here:

D16. In a room containing a fixed bath or shower, parts of a lampholder likely to be touched by a person replacing a lamp shall be constructed of, or shrouded in, insulating material and, for bayonet-type (B.22) lampholders, be fitted with a protective shield complying with B.S.52.

Note - The use of totally-enclosed lighting fittings is desirable in such circumstances.

Hence the HO skirt!

The other one is a table of max EFLI for EL protection by semi-enclosed fuses, or cartridge fuses with a fusing factor >1.5.

Current rating of fuse............Impedance

5.............................................16
10............................................8
15............................................5.3
20............................................4
30............................................2.7
45............................................1.8
60............................................1.35
100..........................................0.8

Note the figure for 100A. Same as the max Ze for TN-S systems.

 

[NotHimAgain]

14. Where indoor wires are put out of sight, as beneath flooring, they should be thoroughly protected from mechanical injury, and their position should be indicated.

Seem like only yesterday - circa 1st Edition 1883

 

[securespark]

Not a bad reg. to bring back!

 

[milliamp]

Does anyone know where previous editions of the regs can be found?
I started working with a local electrician when the 13th or 14th were the standard of the day and would be interested to read through some of the old regs.

 

[securespark]

I bought my copy of the 14th from ebay.

 

[jockspark]

i got mine for my 15th birthday from me da
i think he found it so i had to become a sparks
so it wouldnt be wasted

 

[securespark]

Assuming the 14th was in force when bought for you, you are between 43 & 58 years old!

 

[jockspark]

Assuming the 14th was in force when bought for you, you are between 43 & 58 years old!

hit the big 50 this month

 

[securespark]

HB2U, HB2U, HBDJS, HB2U!

 

[RF Lighting]

Look at you all down with the kids and that

 

[Click-Sure]

I've got a copy of the 11th promised to me. 1939-1950.

Unfortunately the gu owho promised it me has recently been taken ill and has just had a triple heart bypass, poor bugger. Must have shaken hands with the national grid too many times, not that there was much of one when he started!

 

[securespark]

Look at you all down with the kids and that

[Rap]I'm a spark and my name's Secure, I'm the best, not down in the sewer, I do a good job an' I do it right, use the best gear, not none o' that sh*te[/Rap]

 

[Stoday]

I remember designing a PME installation on a farm using single core Pyro, with the neutral/earth on the sheath (which was permitted by the 13th, I think, in 1965). Well, multicores too, but always one less core than you'd expect.

I thought at the time that some future electrician would be flummoxed by the wiring.

The company I worked for was NICEIC and it did, of course, get selected for inspection. Passed without fault I might add.