Installation Manual

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STEP 21. Connect the LSP’s Grid Detection Circuit (GDC) Wires to the Grid Side of
an Automatic Transfer Switch (ATS) or Microgrid Interconnect Device
(MID)
WARNING: HIGH VOLTAGE. ENSURE MAIN BREAKER IS OFF. MAIN SERVICE LINES ARE ALWAYS LIVE.
AVERTISSEMENT: HAUTE TENSION. ASSUREZ-VOUS QUE LE DISJONCTEUR PRINCIPAL EST ÉTEINT. LES
CONDUCTEURS DE SERVICE PRINCIPAUX SONT TOUJOURS SOUS TENSION.
Tools: Wire stripper and wire splice connectors
NOTE: The GDC monitors the presence of grid voltage. The GDC must be installed so that it is not
backed up by storage. Land the “Grid Neutral” wire at the most upstream neutral bar or terminal
possible. Extend the “Grid Line” wire via suitable wire splice connector and land it on non-backed-up
circuit breaker or perform a supply-side connection (or “line-side tap”) on a wire that will lose power in
a grid outage. The 12 AWG wires in this circuit must have overcurrent protection per local code.
Connect black wire
to a portion of the
electrical system
that will lose power
in a grid outage
“Grid Neutral”
(White)
“Grid Line”
(black)