Fill in the blank. An industrial control panel shall not be installed where the available short-circuit current exceeds the _____ of the industrial control panel in accordance with Sec. 409.110(4). As ...

In Part 1 of this two-part series, we presented a 3-phase, 480VAC motor circuit with its associated controls (Figure). We stepped through a logical, systematic approach to troubleshoot the main power ...

Higher Capabilities for Safety-Rated Control Circuits A truly reliable safety control system must work even when some parts fail. Force-guided relays are unseen components that add another level of ...

Leviton has announced a new version of its Load Center breaker box for homes, and it’s adding an integrated Wi-Fi or Ethernet hub that will let you manage your home electrical setup directly from your ...

When striving for long-term sustainability, designers have latitude as to how complex a system they wish to design. Build sustainability into every aspect of the control panel’s life—design, ...

The input-voltage range for a typical voltmeter IC is usually ±200mV, with precision of 3½ or 4½ digits. A sigma-delta panel-meter IC from Maxim (MAX1499) is no exception, but you can easily double ...

The Machine Primary Control Elements (MPCE) 1 and 2 are typically a relay with force guided contacts. When a safety interlock, light curtain, or e-stop switch opens a circuit, the MPCE NO contacts ...