Powermatic 2700 - Manual (Page 10)

10
This machine must be grounded. Grounding
provides a path of least resistance to help divert
current away from the operator in case of electrical
malfunction.
Make sure the voltage of your power supply
matches the specifications on the motor plate of the
machine.
The PM2700 Shaper should be connected to a
dedicated circuit, and protected by a circuit breaker
or time delay fuse, with minimum amp ratings as
shown in Table 1. Local codes take precedence
over recommendations.
Voltage Conversion (3 Phase Shaper only)
On the 3 phase model, to convert from 230V to
460V, replace the 230V switch with the 460V
switch (not included, order part no. PM2700-114C),
and re-wire the incoming leads to the motor as
shown on the diagram inside the cover of the motor
junction box. A similar diagram is also included in
the back of this manual. (Figure 3 shows a
summary of the lead changes for 230V to 460V
conversion.) Note: In case of discrepancies, the
diagram in the motor junction box should take
precedence.
Extension Cords
The use of extension cords is discouraged. Try to
position equipment within reach of the power
source. If an extension cord becomes necessary,
make sure the cord rating is suitable for the
amperage listed on the machine's motor plate. An
undersize cord will cause a drop in line voltage
resulting in loss of power and overheating.
The chart in Table 2 shows the correct size cord to
use based on cord length and motor plate amp
rating. If in doubt, use the next heavier gauge. The
smaller the gauge number, the heavier the cord.
Model Recommended circuit*
1280100C (3HP 1PH 230V) 30 Amp
1280101C (5HP 1PH 230V) 40 Amp
1280102C (5HP 3PH 230V) 30 Amp
1280102C (5HP 3PH 460V) 15 Amp
*subject to local codes
Table 1
Figure 3
Amps
Extension Cord Length *
25
feet
50
feet
75
feet
100
feet 150
feet 200
feet
< 5 16 16 16 14 12 12
5 to 8 16 16 14 12 10 NR
8 to 12 14 14 12 10 NR NR
12 to 15 12 12 10 10 NR NR
15 to 20 10 10 10 NR NR NR
21 to 30 10 NR NR NR NR NR
*based on limiting the line voltage drop to 5V at 150% of the
rated amperes.
NR: Not Recommended.
Table 2