Dual 120VAC Mains Voltage Monitor with IoT Interface

Hardware
1

Can these be placed in series to monitor 240AC?
Would the accuracy take a hit?
Can I place 4 of these in series and monitor 480VAC?
Thanks,

2

Hi,
That wont work.
You will need a transformer which can convert either
480V to 9V AC
or
480V to 120V AC

if you happen to know how many units you need we can get a 480V to 9V transformer for you.

Thanks