Honeywell Box for fault-free Sundial wiring connections
Excellent for wiring up Honeywell Sundial C,S or Y for a first-time correct result. Good-looking sturdy box. Clear labeling in the box, and one terminal per wire, grouped by application (e.g. ROOM STAT, BOILER etc.) makes it a breeze to hook up right. Like all Honeywell products it's well made, but don't try to push it beyond its spec. In particular, the screw down terminals will only take a single 1.5 mm core, as specified, so if you try to use heavier wire, or try to put two wires into one terminal, it won't go. Even the correct cable ought to be tinned first if it's flex. It's not uncommon for installers to use a heavier bit of cable of the right size that they happen to have lying around to do the CH/HW wiring. No safety problem with that, but it will not fit in this junction box, and you will need the more basic 5A connector-strip style boxes.
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