What cover controls do KWIKstarters have? Why can’t I have an HOA or Pilot Light only on the larger KWIKstarters? What does the wire size have to do with the cover control options? What is the difference between remote control and without remote control?
KWIKstarters range in size from 9 to 43 amps, or 1/2 HP single phase (@ 115V) to 30HP (@460V). The cover control options for these compact starters vary from simple START and STOP pushbuttons, selector switches, and Forward-Stop-Reverse multi-function pushbuttons on reversing units.
Sprecher + Schuh offers KWIKstarters preassembled for quick turnaround, or as components. Because Sprecher + Schuh is a UL508A approved panel shop, we want to insure the best quality product reaches our customer. UL508A requires control panels to protect the control circuit in which its path is to leave the control panel assembly (remote control). To meet UL508A, a panel builder and/or user must have the proper motor branch circuit protection of common control circuits. This means, even if the short circuit protection is not directly inside the panel, such as in a KWIKstarter, the manufacturer must still consider how the panel will be protected.
Non-combination (Across-the-line) KWIKstarters are a prime example of applications utilizing common (or local) control. The compact size of KWIKstarters does not allow space inside the enclosure for fuse blocks or miniature circuit breakers for protection of the control circuit. Because of their compact size, and because the branch (short circuit) protection device is outside of the enclosure, the KWIKstater must compensate with its wire size for the maximum current expected from the outside power. UL508A sets guidelines for wire sizes as they relate to usage with remote control devices versus without remote control devices.
- “Without remote control device”- This includes a branch circuit that stays within the panel and does not rely on any remote signals, and has a maximum protective rating according to wire size. For example, START-STOP or ON-OFF push button devices that turn the circuit on or off manually at the starter cover.
- “With remote control device”- This includes a branch circuit that relies on a remote signal to control the starter, and has a maximum protective rating according to wire size. For example, a HAND-OFF-AUTO switch, Pilot RUN light or a Reset only device would be controlled from a remote location.
- See below excerpts from UL508A Tables 41.1 and 41.2 for required wire sizes