hi...i recently put a post on here regarding wiring 2 doorbells off 1 transformer..they did not work as suggested by wiring off the 1a transformer..i managed to get it working by replacing the old 1a transformer with a new 2a transformer...works perfectly now but i have used bell wire to connect the 2 doorbell units together..is this adequate and safe to carry upto 2 amps or can i use 4 core telephone cable or something similar..maybe 0.5mm cable....thanks