Panel Shops
DIN Rail Terminal Blocks vs Power Distribution Blocks vs Busbar: Which One Belongs in a Control Panel, With UL 1059, UL 1953 and UL 508A Spacing Rules
For UL 508A panel builders and anyone wiring a control enclosure: the three ways to split power and land field wiring, what each is listed to, the current and wire-size ranges, the spacing and bonding rules, and a selection table by function.
Read more
Neutral Bar and Ground Bar Sizing: Positions, Wire Range and Bonding by Service Size, for Panelboards, Subpanels and Transfer Switches
How to pick an add-on neutral or ground bar: count the terminations, match the wire range to the largest conductor, choose the main lug size from the service, and know when the bar must be bonded to the enclosure and when it must be isolated.
Read more
