BTU = British Thermal Unit..
Added on August 1, 2009, 1:29 pmTo futher support my previous statement... i've manage to get some technical information from Draka Cable.
For 1.5mm sq cable, the conductor resistance is 12.1 ohm for every 1 kilometer / 1000mtr
For 2.5mm sq cable, the conductor resistance is 7.41 ohm for every 1 kilometer / 1000mtr
For 4.0mm sq cable, the conductor resistance is 4.6 ohm for every 1 kilometer / 1000mtr
so by upgrading say 2.5mm sq cable to 4.0mm sq cable, the resistance different is 2.81 ohm for every 1000 mtr or 0.00281 ohm per meter.
and for an average power point in house, the distance are or about 15meter, which work out to be 0.04215 ohm.
u think such small significant can play role in power consumption? And, when u upgrading the cable, u will need to use a bigger cable conduit or casing... which is also cost. However, no doubt each cable be it 1.5, 2.5 or 4.0mm have their own current capacity limitation... and as long the electrical engineer done his calculation + some safety factor, then it should be alright.
Just like ur house Syabas incoming pipe.... dont tell me if u pipe ur whole house to bigger pipe to all ur kitchen or toilet, then ur water bill is less? does not make sense right?
QUOTE(am_eniey @ Jul 31 2009, 12:15 PM)
Thicker cable is always better. It's just the cost of the cable that matters to most people. It is indeed extra expensive. I spent around RM1K just for the cables only but long term wise, it benefits me.
There are multibillion of electrodes flowing in a cable. If a machines requires 10A, it still gets 10A from any type of cable. The difference is how the 10A is coming through from the DB to the machine, through a thin or a thick cable. Just like billions of cars travelling from KL-Penang at one time for example. Which type of road has lesser resistance, PLUS highway or the old road. KL is the DB, Penang is the machine. The road is the cable. It's not quite a comparison btw but at least it gives a better picture.
Added on August 1, 2009, 1:42 pmTo futher support my previous statement... i've manage to get some technical information from Draka Cable.
For 1.5mm sq cable, the conductor resistance is 12.1 ohm for every 1 kilometer / 1000mtr
For 2.5mm sq cable, the conductor resistance is 7.41 ohm for every 1 kilometer / 1000mtr
For 4.0mm sq cable, the conductor resistance is 4.6 ohm for every 1 kilometer / 1000mtr
so by upgrading say 2.5mm sq cable to 4.0mm sq cable, the resistance different is 2.81 ohm for every 1000 mtr or 0.00281 ohm per meter.
and for an average power point in house, the distance are or about 15meter, which work out to be 0.04215 ohm.
u think such small significant can play role in power consumption? And, when u upgrading the cable, u will need to use a bigger cable conduit or casing... which is also cost. However, no doubt each cable be it 1.5, 2.5 or 4.0mm have their own current capacity limitation... and as long the electrical engineer done his calculation + some safety factor, then it should be alright.
Just like ur house Syabas incoming pipe.... dont tell me if u pipe ur whole house to bigger pipe to all ur kitchen or toilet, then ur water bill is less? does not make sense right?
QUOTE(am_eniey @ Jul 31 2009, 12:15 PM)
Thicker cable is always better. It's just the cost of the cable that matters to most people. It is indeed extra expensive. I spent around RM1K just for the cables only but long term wise, it benefits me.
There are multibillion of electrodes flowing in a cable. If a machines requires 10A, it still gets 10A from any type of cable. The difference is how the 10A is coming through from the DB to the machine, through a thin or a thick cable. Just like billions of cars travelling from KL-Penang at one time for example. Which type of road has lesser resistance, PLUS highway or the old road. KL is the DB, Penang is the machine. The road is the cable. It's not quite a comparison btw but at least it gives a better picture.
This post has been edited by gunh: Aug 1 2009, 01:42 PM