The new gn3

[Farmelectrics]

Ok I no the new gn3 and regs don't come into effect till June but my question is about the new Eli values given in the new gn3. Ok so a 32 amp c type has come down from 0.58. To 0.55. But if you look in table a4 in the new gn3 a 6amp c type has come down from 3.09. To 1.76. Now is this a mistake by the iet because. That value has dropped 1.33 ohms the reason I'm asking is that testing high bay lighting today and though my readings will pass as there under 3.09. Come July they'll fail as there above the new disputed value of 1.76. Your thoughts please

 

[telectrix]

strange hoe the IET has rewritten ohms law, but still got it wrong. a lot of the Zs figures stated are incorrect.

 

[Farmelectrics]

I'm going to phone them Monday tel ha ha think they'll admit there mistake or better still give me a new book I am right aren't I that's why I was testing the water with you guys before I phone up

 

[GMES]

The new gn3 and onsite guide have several mistakes in them.

 

[Farmelectrics]

Not got my byb with me will have to check the 100% values to compare but I'm sure this new gn3 is wrong.

 

[Farmelectrics]

Well if there's mistakes in them the iet should issue us with new books as you no there not cheap

 

[Deleted member 26818]

You can download the Errata from the IET web site.

 

[telectrix]

so if i did an installation using undersized cables, it's OK coz' the customer can download the right size of cable from my website. :ack2:

 

[Deleted member 26818]

The IET don't consider the mistakes as being much of a problem, as very few electricians use either GN3 or the OSG.

 

[shanky887614]

The IET don't consider the mistakes as being much of a problem, as very few electricians use either GN3 or the OSG.

there are issues in the bs7671 as well so

 

[Farmelectrics]

What is errata

 

[Paul.M]

A C6 is 2.91 Ohms now.

Table A4 page 121 on C types is almost completely incorrect. Download the amended version of the amendment lol.

 

[shanky887614]

A C6 is 2.91 Ohms now.

Table A4 page 121 on C types is almost completely incorrect. Download the amended version of the amendment lol.

when is amend4 being released?

im tempted to send mine back for miss selling it to me lol

 

[Paul.M]

when is amend4 being released?

im tempted to send mine back for miss selling it to me lol

"Apparently" (via the grapevine), the 18th Ed is coming out in 3 years time????

 

[Farmelectrics]

Just spent in the last few months over a hundred pounds on the new books only for them to be wrong not happy