Seven systems, three layers each.
A catalogue is organised by product because that is how a factory ships. A plant is bought by system, because that is how it fails. Each of the seven below is written the same way: what touches the process, what decides, and what keeps the record that survives an audit. Origin is stated per line, because the duty on a steel enclosure and the duty on a control board are no longer the same number.
Why the origin split is on this page rather than in a footnote. Since 6 April 2026 the Section 232 metals duty applies to the full customs value of an article rather than to the metal content inside it. Busbar, cable tray, conduit fittings and most electrical enclosures sit at 25%. A control board with under 15% combined steel, aluminium and copper by weight falls outside that duty entirely. Those two facts point in the same direction: build the heavy sheet-metal part here, import the electronics, and assemble to UL 508A in a listed shop.
That is what this company does, and it is stated on every system below so that a buyer can check the arithmetic instead of taking a claim on trust.
Fifty-six more families we quote but do not photograph.
The core catalogue is what sits on a shelf in Arcadia and has a studio photograph. Everything below comes from the same factories on a normal lead time. Listing a part here means we can supply it, wire it and support it — not that a box of them is waiting.
Not everything in this industry can be sold here any more.
Four product categories have been closed to foreign production in the last twelve months, and two of them are categories most Chinese suppliers will still quote you for. We publish which ones, with the date and the instrument, on a page of its own.
If a quotation you have received elsewhere includes any of those categories, the answer to "can this be imported" is no, and it will not improve with a different freight forwarder.
What we can and cannot supply