Adda comment. -1. The generally accepted figure for 1 mm 2 wire is 10 A, but that's for wires run with others. As heating goes as I2R I 2 R, you can see 15 A generates a bit more than twice what is generally considered acceptable. If you're happy with the voltage drop, then 15 A in 1 mm 2 wire is just about usable as long as it's single A1mm line can tolerate anywhere between 11 and 14 amps. But if your priority is 1 sq mm, the amps will depend on the installation method: Surrounded by thermal insulation (Less than 100mm) and in contact with plasterboard – 13 Amps. Surrounded by thermal insulation (More than 100mm) and in contact with plasterboard – 10.5 Amps. A2.5mm cable is capable of supplying around 23-25 amps depending on the method of installation, so is fine, safe and compliant on a 20amp circuit breaker. How much current can 1.5 sq mm wire carry? 1.5 sqmm Finolex Electrical Wire, 90m Brand Finolex Wire Size 1.5 sqmm Certifications IS 694 : 1990 Insulation Material How much Thispage details SWA Cables. BETTER • SMARTER • SAFER +44 (0)2380 231800 [email protected] PYC +44 (0)2380 231800 Table 4E4A – Current Carrying Capacity in Ampere. Current Rating Chart for Multicore Armoured; Ifyou look at the guidance for domestic cookers the IET guidance is 10A plus 30% of any current above that. So a typical 50A large cooker would be taken as 10 + 0.3* (50-10) = 22A for circuit rating. Again, this is domestic, if you are designing for a professional kitchen they have significantly higher usage. Withlarger conductors, we see that a 10 mm 2 conductor has a rating of about 60 Amps, ie the current density has dropped to only 6 Amps per mm 2. The largest conductor in a table of current ratings is 300 mm 2, and for this size the current rating is approximately 510 Amps. The current density has now reduced to just above 1.5 Amps 2single core cables 3 single core cables in trefoil, or 1 three core or four core 3 single core cables flat and touching 3 single core cables flat & 2.6 4.2 7 7 4.2 2.6 10 17 28 28 17 10 Yeah just hoping the 2.5mm 2 would be OK, save having to pay for bigger cable, since I already have 2 reels of the stuff. The maximum current rating of the cable is the maximum SAFE operating current to ensure those sorts of temps aren't reached (unless you're doing something idiotic). There is still some spare capacity in the cable Thetable below shows the current carrying capacity for 2.5mm twin and earth cable. This cable is mainly used for 32A ring mains and 16A radial socket circuits in oR6k.

2 5mm cable current rating