A lift station is a small building nobody works in. The pumps run, the wet well rises and falls, and the only people who see the inside are the ones...Read More

A semiconductor tool is qualified as a whole. The recipe, the timing, the interlocks and the code that runs them were proven together, and the fab...Read More

A DC bus never crosses zero. When a contactor opens under a DC load, the arc that forms between the parting tips does not go out on its own; the...Read More

NFPA 79 is the Electrical Standard for Industrial Machinery. It picks up where UL 508A stops, at the enclosure wall, and covers the electrical...Read More

If you build industrial control panels or machines, the UL Mark is not a marketing badge. It is what the inspector looks for before a panel gets...Read More

UL 489 is the standard for molded-case circuit breakers, the devices that provide branch circuit, feeder, and service protection in a control panel....Read More

UL 508A is the standard a panel shop builds to and the label an inspector looks for on an industrial control panel. It is also where a lot of...Read More

Every power drop in a Northern California or Northern Nevada facility ends the same way. A human hand mates the connector. During the build. During...Read More

DC contactor datasheets lead with the cycle count. It is the first number engineers compare, and it carries an implied weight of reliability that it...Read More

Your meter says the contactor is fine. Whether it can still break a 1,500-volt DC arc is a different question and nothing on the outside will tell...Read More