Application Data
Types M and T integral horsepower manual starters provide convenient On-Off operation of small
single-phase, polyphase, or DC motors. Typical applications include small machine tools, pumps, fans,
and conveyors. They feature push button or toggle operators and reliable overload protection. Pilot
lights and auxiliary contacts are available. For modifications, see page 17.
Size: Available in NEMA Sizes M-0, M-1, and M-1P
Poles:
AC: Two poles single-phase; three poles polyphase
DC: 2 poles (3 poles in series)
Voltage Rating: 600 Vac maximum, 250 Vdc maximum
Overload Relays: Melting alloy thermal overload relays have provisions for one Type B thermal unit
for single-phase starters, or three Type B thermal units for three-phase starters. All thermal units must
be installed, and the device reset, before the starter contacts will operate. After an overload relay trips,
wait one or two minutes before resetting to allow the alloy to solidify.
Operator: Open and NEMA 1 versions are available with a push button or toggle operator. NEMA 4
and 12 are available with a direct-acting push button only. NEMA 4X and 7 & 9 use an external toggle
to actuate a push button device inside.
Mechanism Lock Off: Open devices and starters in the following enclosures can be locked in the Off
or Stop position: NEMA 1 surface and flush mounting; and NEMA 4, 4X, 7 & 9, and 12 .
Devices in the following enclosures can also be locked closed to prevent unauthorized entry: NEMA 1
surface mounting; and NEMA 4, 4X, and 12 . NEMA 7 & 9 enclosures are bolted closed
