Part Number 000001590 Rev03 11/19 11
Electrical Service
Prepare electrical circuit before installation of your ice
machine. Installation requires a grounded (three-prong),
polarized receptacle with a separate fuse/circuit breaker in
an electrical service box.
VOLTAGE
The maximum allowable voltage variation is ±10% of the
rated voltage at ice machine start-up (when the electrical
load is highest).
All electrical work, including wire routing and grounding,
must conform to local, state and national electrical codes.
The following precautions must be observed:
• The ice machine must be grounded.
• A separate fuse/circuit breaker must be provided for each
ice machine.
• The maximum allowable voltage variation is +/-10%
of the rated voltage at ice machine start-up (when the
electrical load is highest).
• Check all green ground screws in the control box and
verify they are tight before starting the ice machine.
• Manitowoc’s recommended minimum wire size is #14 for
less than 100’ or #12 for more than 100’ to 200’ (solid
copper conductor only). The recommended breaker is
15 amp. Local or state electrical code, length of run or
materials used, can increase the minimum wire gauge
required. A qualified electrician must determine the
proper wire size, although #14 is the minimum size
allowed.
• Incorrect polarity can lead to erratic ice machine
operation and a safety issue.
MINIMUM CIRCUIT AMPACITY
The minimum circuit ampacity is used to help select the wire
size of the electrical supply. (Minimum circuit ampacity is not
the ice machine’s running amp load.)
ELECTRIC REQUIREMENTS
Refer to Ice Machine Model/Serial Plate for voltage/
amperage specifications.
Maximum breaker size & minimum circuit amperage chart
Model
Voltage Phase
Cycle
Air-Cooled
Maximum
Fuse circuit
Breaker
Minimum
Circuit
Ampacity
SM50A
115/1/60
15
4.1
GFCI REQUIREMENTS
If GFCI (ground fault circuit interrupter) is required by local
electrical code, it must be breaker type.
