On 21/11/2024 09:46, Theo wrote:
To answer Tim's question, the 'mm' in T&E cable is usually 'mm2' area of the
conductor.
Graham. <graham-usenet@mail.com> wrote:
I've often wondered why why CSA is used rather than diameter,
perhaps it goes back 100 years to when wire was sometimes drawn
into square section strands.
CSA is useful in calculations for resistance.
But less useful if you're stuffing higher frequencies down that
cable/wire. Then it's the circumference that matters.
If it's a high frequency cable it's usually some kind of twisted pair or coax, which are sold by insertion loss over a frequency range not by
cable area. Domestic mains wiring tends not to worry about that. OK, Homeplugs try stuffing high frequencies down it, but the results are unsurprisingly awful.
| Sysop: | Keyop |
|---|---|
| Location: | Huddersfield, West Yorkshire, UK |
| Users: | 497 |
| Nodes: | 16 (2 / 14) |
| Uptime: | 08:31:40 |
| Calls: | 9,781 |
| Calls today: | 22 |
| Files: | 13,748 |
| D/L today: |
1 files (1K bytes) |
| Messages: | 6,187,073 |