For Machines Mfg. Since 3/11 | P R E P A R A T I O N |
Grounding Requirements
In the event of certain types of malfunctions or breakdowns, grounding provides a path of least resistance for electric
Improper connection of the
Check with a qualified electrician or service personnel if you do not understand these grounding requirements, or if you are in doubt about whether the machine is properly grounded. If you ever notice that a cord is damaged or worn, disconnect it from power, and immediately replace it with a new one.
220V Operation
The power cord and plug specified under Circuit Requirements section for the Model SB1053 on the previous page has an
GROUNDED
Grounding Prong
is Hooked
PLUG
Current Carrying Prongs
Figure 11. Typical NEMA L15-30 plug and receptacle.
Electrocution or fire may occur if machine is not correctly grounded and attached to the power supply. Use a qualified electrician to ensure a safe power connection.
440V Operation
As specified in the Circuit Requirements section for the Models SB1054F and SB1055F on the previous page, these machines must be hardwired to the power source, using a locking switch (see Figure 12). These machines must also be connected to a grounded metal permanent wiring system; or to a system with an equipment- grounding conductor. Due to the complexity and high voltage involved, this type of installation MUST be done by a qualified electrician or service personnel.
| LOCKING |
DISCONNECT SWITCH | |
Power Source | Machine |
Conduit | Conduit |
Ground | Ground |