Grizzly Vertical Milling Machines G0728 - Manual (Page 11)

Model G0728–31 (Mfg. Since 11/11)
-9-
SECTION 2: pOWER SuppLy
Availability
Before installing the machine, consider the avail-
ability and proximity of the required power supply
circuit. If an existing circuit does not meet the
requirements for this machine, a new circuit must
be installed. To minimize the risk of electrocution,
fire, or equipment damage, installation work and
electrical wiring must be done by an electrican or
qualified service personnel in accordance with all
applicable codes and standards.
Electrocution, fire, or
equipment damage may
occur if machine is not
correctly grounded and
connected to the power
supply.
full-Load Current Rating
The full-load current rating is the amperage a
machine draws at 100% of the rated output power.
On machines with multiple motors, this is the
amperage drawn by the largest motor or sum of all
motors and electrical devices that might operate
at one time during normal operations.
full-Load Current Rating at 110V ...... 18 Amps
full-Load Current Rating at 220V ....... 9 Amps
The full-load current is not the maximum amount
of amps that the machine will draw. If the machine
is overloaded, it will draw additional amps beyond
the full-load rating.
If the machine is overloaded for a sufficient length
of time, damage, overheating, or fire may result—
especially if connected to an undersized circuit.
To reduce the risk of these hazards, avoid over-
loading the machine during operation and make
sure it is connected to a power supply circuit that
meets the requirements in the following section.
For your own safety and protection of
property, consult an electrician if you are
unsure about wiring practices or electrical
codes in your area.
Note: The circuit requirements listed in this man-
ual apply to a dedicated circuit—where only one
machine will be running at a time. If this machine
will be connected to a shared circuit where mul-
tiple machines will be running at the same time,
consult a qualified electrician to ensure that the
circuit is properly sized for safe operation.
A power supply circuit includes all electrical
equipment between the breaker box or fuse panel
in the building and the machine. The power sup-
ply circuit used for this machine must be sized to
safely handle the full-load current drawn from the
machine for an extended period of time. (If this
machine is connected to a circuit protected by
fuses, use a time delay fuse marked D.)
Circuit Information
Circuit Requirements for 220V
Nominal Voltage .............................. 220V/240V
Cycle ..........................................................60 Hz
phase ........................................... Single-phase
power Supply Circuit ......................... 15 Amps
plug/Receptacle ............................. NEMA 6-15
This machine can be converted to operate on a
220V power supply (refer to
Voltage Conversion
instructions). This power supply must have a veri-
fied ground and meet the following requirements:
This machine is prewired to operate on a 110V
power supply circuit that has a verified ground and
meets the following requirements:
Circuit Requirements for 110V
Nominal Voltage ...............................110V/120V
Cycle ..........................................................60 Hz
phase ........................................... Single-phase
power Supply Circuit ......................... 20 Amps
plug/Receptacle ............................. NEMA 5-15