Overview
WattNode meters require a voltage connections to the electrical service that is powering the load being measured: 120, 208, 230, 240, 277, 347, 400, 480, or 600 Vac. A five circuit green Euro-style screw terminal block on the right side of the meter provides connections for phases A, B, and C, along with neutral and safety ground. The terminal block can handle solid or stranded wire sizes up to 12 AWG (2.5 mm2) wire. Recommended screw torque is 3.5 lbf⋅in (4.08 kgf⋅cm).
Wire Types
For installation in North America, we recommend UL listed wire that meets National Electrical Code (NEC) requirement for use in electrical panels, such as THHN, THWN, or MTW. These wires are commonly rated for 600 Vac, but 300 Vac rated wire may be used for 120, 208, or 240 volt applications.
Stranded vs. Solid
We recommend stranded wire if possible, because it is more flexible which makes it easier to work with inside a crowded enclosure. Stranded wire also puts less stress on the screw terminal block.