The power and grounding terminals and field termination points on the carriers' terminal blocks are 2.8 mm by 2.5 mm (2.8 mm x 2.5 mm). The maximum recommended wire size for the terminals is 14 AWG, stranded or solid gauge wire, or a 14 AWG ferrule. To select wire, calculate the maximum current limit expected for each wire. Local electrical codes define the wire size required for a specific current.
Shielded twisted pair wiring is recommended for low-level signal wiring to reduce susceptibility to noise.