resitance of 6mm t&e per meter.

[vitoboy]

any one let me know the resitance of 1m of 6mm t&e .ie 6mm live and 4mm cpc if shorted out.
ta guys

 

[zone77]

if you r talking about twin n earth i think the cpc is 2.5mm (4mm on 10mm TnE).

1m of 6mm copper = 0.01 ohm +

1m of 4mm copper = 0.017 ohm

this would total 0.027 ohm or i would round to 0.03 ohm

 

[Sav]

Hi,
If its 6mm line conductor and 4mm cpc then resistance would be 7.69 milli ohms per metre.

If its wrong, please let me know as I just checked on G3 page 104

Regards,Sav

 

[Guest123]

Hi,
If its 6mm line conductor and 4mm cpc then resistance would be 7.69 milli ohms per metre.

If its wrong, please let me know as I just checked on G3 page 104

Regards,Sav

At an ambient of 20degrees Sav, it would.

 

[Sav]

Thanks lenny,

Got a bit ahead of myself there !!

Regards,
Sav

 

[Notsosmart]

The resistivity of pure copper is 1.7 × 10-8 W m3

resistance = resistivity × length divided by area (csa) Therefore;
R= rl
.....A

So a 6mm2 wire will be;
(1.7 × 10-8) x 1, divided by (6 x 10-6)
or (1.7 × 10-2) divided by 6
= 0.0028 W

or 2.8 mW

Alternatively you could use the tables in the OSG;

​

 

[Guest123]

He was asking about T+E.....

 

[Sav]

Looks like we got the Open University here...............

 

[Notsosmart]

He was asking about T+E.....

Okay Ben Is this better?

1 metre of 6mm =

(1.7 × 10-8) x 1, divided by (6 x 10-6)
or (1.7 × 10-2) divided by 6
= 0.0028 W

or 2.8 mW

+

1 metre of 4mm

(1.7 × 10-8) x 1, divided by (4 x 10-6)
or (1.7 × 10-2) divided by 4
= 0.00425 W

or 4.25 mW

Total = 2.8 + 4.25

= 7.05 mW

 

[Guest123]

Okay Ben Is this better?

1 metre of 6mm =

(1.7 × 10-8) x 1, divided by (6 x 10-6)
or (1.7 × 10-2) divided by 6
= 0.0028 W

or 2.8 mW

+

1 metre of 4mm

(1.7 × 10-8) x 1, divided by (4 x 10-6)
or (1.7 × 10-2) divided by 4
= 0.00425 W

or 4.25 mW

Total = 2.8 + 4.25

= 7.05 mW

C'est bon.

 

[Notsosmart]

if you r talking about twin n earth i think the cpc is 2.5mm (4mm on 10mm TnE).

1m of 6mm copper = 0.01 ohm +

1m of 4mm copper = 0.017 ohm

this would total 0.027 ohm or i would round to 0.03 ohm

You could be right, i think it depends on the manufacturer

so 1 metre of 6mm =

(1.7 × 10-8) x 1, divided by (6 x 10-6)
or (1.7 × 10-2) divided by 6
= 0.0028 W

or 2.8 mW

+

1 metre of 2.5mm

(1.7 × 10-8) x 1, divided by (2.5 x 10-6)
or (1.7 × 10-2) divided by 2.5

= 0.0068 W

or 6.8 mW

Total = 2.8 + 6.8 (mW)

= 9.6 mW

or 9.6 x 10-3 W

This isn't fun any more I now have a headache