Hach SC4500 User Instructions page 10

Use cabling with a wire gauge of 0.08 to 1.5 mm
300 VAC or higher. Use twisted-pair shielded wire
2
Do not use wire gauge other than 0.08 to 1.5 mm
from mains power and relay circuits.
3
Use of non-shielded cable may result in radio frequency emission or susceptibility levels higher
than allowed.
10 English
N O T I C E
2
(28 to 16 AWG)
3
.
2
(28 to 16 AWG), unless wires can be isolated
2
and an insulation rating of