system TN-C-S 0.35 32 amp circuit breaker type b Zs Max 1.44 amps 160 2.5 mm2 + 1.5 mm2 r1 + r2 resistance per metre is 19.51 you use 13 mtr 2.5 mm2 wire to spur from upstairs room socket to the loft. volt drop 18 mV x amp x length / 1000 what will be the first task? do we need to find out the resis...
how to find out the maximum permissible length for a spur using mathematics. this is how i learnt how to calculate volt drop TYBE B CIRCUIT BREAKER 32 AMP LIVE 2.5 MM CPC 1.5 MM length 66 mtr R1 + R2 0.32 OHMS RN rn for 2.5 mm is 7.41 7.41 * 66 mtrs / 1000 = .49 RN = 0.49 MAx Zs for type B 32 amp ci...
"So calculation C type = x10 so max current = 160A @ 230v that's 1.4375 ohms max so assuming 0.35 (PME) on incoming supply you have 1.0875 ohms so around [b]6.17 meters is max length of a 4mm supply[/b]. " please can you show the calculation method you used to determine the max length for ...
[quote] So if a shed was supplied with a 16A supply and has no sockets only a single light then although it has 16A supply one would calculate volt drop on max bulb size[/quote] example 60 watt bulb and 1 socket to power up 1800 watt heater. 1860 watts volt drop for 4 mm2 = .011 per mtr 8.09 amps x ...
i heard that if the ACTUAL Zs Value is LOWER than the MAX Zs value then the circuit is okay. so 10 x 16 amps = 160 . 230 / 160 = 1.4375 max zs value. is the actual zs value added to r1 + r2 value?
[quote] ...say why you want to test the lighting circuit with an ohm meter? [/quote] i done an experiment and managed to get the lighting circuit working perfectly. the MAIN CU is located in the front room. 16 AMP WIRE (MAX 24 AMPS) connected to 16 amp MCB IN MAIN CU. FRom main CU , 16 amp wire lead...
how do you test a lighting circuit with an ohm meter? i know the 1st step is to switch off the power supply feeding the lighting circuit, then what do i do? i heard that tere should be a reading of 0.5 m ohms
is there a consumer unit with 16 amp rcbo switch? is it possible to replace a double pole 40 amp rcbo with 16 amp double pole rcbo on a consumer unit ? i can't find 16 amp rcbo and 6 amp mcb together in a consumer unit on the web.
