copper conductor resistance per mtr

[kung]

Hi all

Just been watching an NICEIC dvd where in the continuity part is got an example of a 10mm2 copper conductor in back of guidance note 3 it states 10mm2 eqates to 1.83 per mtr. On the vid is says that

10mtr's = 0.02

100mtr's = 0.18

So the 0.03 reading he got while testing a bonding conductor to a water pipe eqated to about 15mtr's of cable installed !

How do you get these answers ?

i got it wrong i done 1.83 / 10 and got 0.18 and 1.83 / 100 and got 0.018 so 0.02 and when i done the 1.83 / 15 got 0.12

etc.

Any help greatfull.

Regards

 

[SPECIAL LOCATION]

Hi allJust been watching an NICEIC dvd where in the continuity part is got an example of a 10mm2 copper conductor in back of guidance note 3 it states 10mm2 eqates to 1.83 per mtr. On the vid is says that

10mtr's = 0.02

100mtr's = 0.18

So the 0.03 reading he got while testing a bonding conductor to a water pipe eqated to about 15mtr's of cable installed !

How do you get these answers ?

i got it wrong i done 1.83 / 10 and got 0.18 and 1.83 / 100 and got 0.018 so 0.02 and when i done the 1.83 / 15 got 0.12

etc.

Any help greatfull.

Regards

As you say 1m of 10mm = 1.83miliohm/meter

Table 9A page 166 on site guide

or

Page 104 appendix A Guidance Note3.

SO....

(1.83miliohm x 10m)/1000 = 0.0183ohm or approx = 0.02ohm

(0.03ohm/1.83miliohm)x1000 = 16.39meters

or

(15m x 1.83miliohm)/1000 = 0.02745ohm or approx 0.03ohm

dunno if that helps at all?

Guiness Drink

 

[kung]

As you say 1m of 10mm = 1.83miliohm/meterTable 9A page 166 on site guide

or

Page 104 appendix A Guidance Note3.

SO....

(1.83miliohm x 10m)/1000 = 0.0183ohm or approx = 0.02ohm

(0.03ohm/1.83miliohm)x1000 = 16.39meters

or

(15m x 1.83miliohm)/1000 = 0.02745ohm or approx 0.03ohm

dunno if that helps at all?

Guiness Drink

Your a diamond m8 !

Just read your post saying much the same back in august 08 for loop imp testing and thanked you for a usefull post now i find you have just replied to my post ! spooky lol !

Thanks so much i feel better now and will be able to sleep !

Kind Regards

Kung.