350 Amp Power Distribution Block, 2 Pole, Primary: #6/0-6 AWG, 1 Tap, Secondary: #14-4, 6 Taps Use these blocks to split primary power into secondary circuits, or join cables from a solar array to a power lead-in cable. Install cables and tighten set screws. Terminal blocks are made of zinc-plated aluminum for use with aluminum or copper conductors. 2 poles. Primary side accepts one large cable; secondary side accepts 6 smaller cables. UL recognized for up to 600 volts.