- Mains CT’s on utility line (grid connection) before transfer switch
- Mains CT’s on load side of transfer switch
I’m interested in learning who has put their CT’s before the transfer switch and who has placed them after the switch.
My CT’s are before the switch (location 1 in attached diagram but new users please see followup question to ryan below and consider location 3 instead of 1 on a new install) so that they can measure all loads under normal operation including Generac’s oil filter heater, battery heater and battery charger which are all internally supplied from the switch itself. But when utility power fails and the generator switches on the CT’s no longer measure anything.
Alternatively place the CT’s after the switch (location 2 in attached diagram) and you’ll monitor your home’s entire consumption while on generator power and have the bonus of monitoring your generator’s frequency and voltage compliance. I suppose that some devices may not be recognized while on generator power as the less steady generator power may alter their signatures beyond recognition. But the all-winter long load of the oil filter (50 watts) and battery (40 watts) heaters will never be recorded.
And a follow-up for @RyanAtSense - I may want to move my mains CT’s from location 1 to location 3; I would need help from support as you’d need to make changes on the back-end. How is this support accomplished and do I lose any device detection if I do it? If I were to make the location 1 to location 3 move then once accomplished I could freely switch between locations 3 and 2 without messing anything up provided I maintained the identity and direction of the clamps. That could be the best of both worlds.
[edited to add wiring diagram]
[edited to add poll]