QUESTION 1: If I have a 4 core 14 AWG cable and a 2 core 14 AWG cable do they contain the same cross sectional area of copper or does the 4 core 14 AWG cable have twice that of the 2 core 14AWG cable ?
I am leaning to "Yes the 4 core has twice the area of copper" as I have seen a few posts on here that state that twisting a 4 core cable in to 2 cores will drop a 14AWG to 11AWG (double the cross sectional area).
QUESTION 2: If a cable is quoted as 14AWG is that 14AWG per core or per cable?
QUESTION 3: If a cable is quoted as having an impedence of 0.01ohm/m (100ohm/km) is that per core or for the entire cable?
I'd be able to answer the next questoin with a definitive answer to QUESTION 3.
QUESTION 4: If I have a 2 core speaker cable rated as above and a 20m cable run to a 8ohm speaker does the following hold true?
Cable impedence/Load = (0.01*20)/8 = 0.2/8 = 2.5%
(or do I need to double the cable length as it has 2 cores?)
QUESTION 5: The above calculation is meant to hold the lowest speaker load. I have read somewhere that a typical 8ohm speaker has a lowest load of 3ohm. Is this correct? Or should 8ohms remain the value of the variable in the above equation?
I ask this as I have also read that for "audiophiles" this value should be below 5%.
Thanks for any help to any of the answers!
EDIT: I forgot this question:
QUESTION 6: What is this all about "(7/15/0.16BC)" - I'm guess, strands per core/twists per ? and something to do with area?