[RE-wrenches] Ilsco IPC's Engineering Hold

AE Solar autonomousenergies at gmail.com
Fri Oct 24 08:59:27 PDT 2025


Wrenches,
I called Ilsco today to get some part numbers for IPCs rated for supply
side connections, and they said that "all their part numbers are on an
engineering hold and are not to be sold". He said that was all he was
allowed to tell me.

I know that their IPC-250-4/0 is rated for supply side connections (as per
NEC 2023) and had been calling to see if any of their smaller IPC's were
rated yet. Anyone have any more information on this 'engineering hold'?
What are folks using for supply side connections on residential systems for
NEC 2023? Thanks
Adam

Adam Katzman (he/him)
Autonomous Energies | Owner/Operator
www.AutonomousEnergies.com <http://www.autonomousenergies.com>
(518) 567-1468
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