electric wire section announced vs and reality !

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iPa41000
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electric wire section announced vs and reality !

Post by iPa41000 » May 12, 2024, 7:47 pm

Hi all,
This morning I bought 30m 1x4 SQ at Globalhouse, BCC blue wire was out of stock, so I bought brand TrippleN price was really low ! At home, by curiosity I measured the diameter of the wire: 1.78mm, so a SQ of 2.5mm2. :shock: What is wrong ?
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iPa41000
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Re: electric wire section announced vs and reality !

Post by iPa41000 » May 13, 2024, 12:35 pm

This morning I bought again electrical wire 1x4mm sq but brand BCC (Bangkok Cable).
Result, measured diameter = 2.22mm so really near 4mm sq ! :D
So be careful with Tripple N brand they sell 2.5mm sq labelled 4mm sq ! :evil:

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jackspratt
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Re: electric wire section announced vs and reality !

Post by jackspratt » May 13, 2024, 1:09 pm

Did you return the dodgy wire for a refund at Global House?

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Charlieb
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Re: electric wire section announced vs and reality !

Post by Charlieb » May 13, 2024, 5:51 pm

Be careful! Another fahlang just arrested for bad mouthing a business.

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Potamoi
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Re: electric wire section announced vs and reality !

Post by Potamoi » May 13, 2024, 6:50 pm

I always buy BCC after a proper sparky recomended it some years ago. It's more expensive but that goes with the territory.
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tamada
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Re: electric wire section announced vs and reality !

Post by tamada » May 13, 2024, 6:58 pm

Charlieb wrote:
May 13, 2024, 5:51 pm
Be careful! Another fahlang just arrested for bad mouthing a business.
No business or brand name has been "bad mouthed" here. The words "rip-off" and "scam" have been avoided. It's only the low-price of the non-compliant material that has been pointed out.

More like a caveat emptor warning for those buying wiring.
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Re: electric wire section announced vs and reality !

Post by dunroaming » May 13, 2024, 7:06 pm

The difference between 4 mm and 4 sq. mm electric wire lies in their respective measurements.

When we refer to "4 mm" electric wire, we are specifying the diameter of the wire in millimeters. This measurement indicates the thickness of the wire.

On the other hand, "4 sq. mm" electric wire refers to the cross-sectional area of the wire in square millimeters. This measurement indicates the actual amount of conductor material present in the wire.

So, while "4 mm" refers to the diameter of the wire, "4 sq. mm" refers to the cross-sectional area of the wire, which is a measure of its carrying capacity.

iPa41000
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Re: electric wire section announced vs and reality !

Post by iPa41000 » May 13, 2024, 8:29 pm

jackspratt wrote:
May 13, 2024, 1:09 pm
Did you return the dodgy wire for a refund at Global House?
No, I saw the issue only after having unrolled them to prepare for pulling wires.
And don't want to waste time with a complaint for a refund.

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David Chop
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Re: electric wire section announced vs and reality !

Post by David Chop » May 14, 2024, 5:05 am

Not going to try to suss out what's going on with that label, but at a guess I'd say it's just mis-labeled.

Anyway, here's what I'd do with the wire itself:
1.78mm wire is a shade over AWG 14 @ 1.63mm.
2.22mm wire is a shade over AWG 12 @ 2.05mm.
I'd sleep easy at night with 15A of circuit protection on the 1.78mm wire and 20A on the 2.22mm, per NEC (US code) specs.

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sometimewoodworker
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Re: electric wire section announced vs and reality !

Post by sometimewoodworker » May 15, 2024, 3:13 am

dunroaming wrote:
May 13, 2024, 7:06 pm
The difference between 4 mm and 4 sq. mm electric wire lies in their respective measurements.

When we refer to "4 mm" electric wire, we are specifying the diameter of the wire in millimeters. This measurement indicates the thickness of the wire.

On the other hand, "4 sq. mm" electric wire refers to the cross-sectional area of the wire in square millimeters. This measurement indicates the actual amount of conductor material present in the wire.

So, while "4 mm" refers to the diameter of the wire, "4 sq. mm" refers to the cross-sectional area of the wire, which is a measure of its carrying capacity.
That is a very interesting and fallacious argument.

Electric cable is always specified by the area of the conductor/s if it is called 4mm or 4sq mm it is the same. It maybe a single conductor or multiple conductors so the actual thickness of the individual conductors is rather less relevant.

Different cables or ropes are usually measured by the diameter not the cross-sectional area as that is the more important information.
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tamada
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Re: electric wire section announced vs and reality !

Post by tamada » May 15, 2024, 8:18 am

Only noobs and DIY'ers consider the outside diameter or thickness of a wire as a valid metric for wire selection. Real electricians primarily pay attention to conductor type, guage and the insulation.
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Re: electric wire section announced vs and reality !

Post by dunroaming » May 15, 2024, 10:48 am

sometimewoodworker wrote:
May 15, 2024, 3:13 am
dunroaming wrote:
May 13, 2024, 7:06 pm
The difference between 4 mm and 4 sq. mm electric wire lies in their respective measurements.

When we refer to "4 mm" electric wire, we are specifying the diameter of the wire in millimeters. This measurement indicates the thickness of the wire.

On the other hand, "4 sq. mm" electric wire refers to the cross-sectional area of the wire in square millimeters. This measurement indicates the actual amount of conductor material present in the wire.

So, while "4 mm" refers to the diameter of the wire, "4 sq. mm" refers to the cross-sectional area of the wire, which is a measure of its carrying capacity.
That is a very interesting and fallacious argument.

Electric cable is always specified by the area of the conductor/s if it is called 4mm or 4sq mm it is the same. It maybe a single conductor or multiple conductors so the actual thickness of the individual conductors is rather less relevant.

Different cables or ropes are usually measured by the diameter not the cross-sectional area as that is the more important information.
Obviously your not qualified in electrical engineering

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