Installation Instructions Section 2
2-4
Part Number 000001590
Electrical Service
GENERAL
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.)
ELECTRICAL REQUIREMENTS
Refer to Ice Machine Model/Serial Plate for voltage/
amperage specifications.
MAXIMUM BREAKER SIZE & MINIMUM CIRCUIT
AMPERAGE CHART
GFCI REQUIREMENTS
If GFCI (ground fault circuit interrupter) is required by
local electrical code, it must be breaker type.
All wiring must conform to local, state and national
codes.
The ice machine must be grounded in accordance
with national and local electrical codes.
Observe correct polarity of incoming line voltage.
Model
Voltage
Phase
Cycle
Air-Cooled
Maximum
Fuse/
Circuit
Breaker
Minimum
Circuit
Amps
SM50A 115/1/60 15 4.1
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