Southbend SB1051 owner manual Grounding Requirements, Extension Cords, Phase Converter

Models: SB1051

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P R E P A R A T I O N

 

For Machines Mfg. Since 5/11

13" x 40" Heavy 13® EVS Lathe

 

 

 

Grounding Requirements

This machine must be grounded! In the event of certain types of malfunctions or breakdowns, grounding provides a path of least resistance for electric current in order to reduce the risk of electric shock.

Improper connection of the equipment-grounding wire can result in a risk of electric shock. The wire with green insulation (with or without yellow stripes) is the equipment-grounding wire. If repair or replacement of the power cord is necessary, do not connect the equipment- grounding wire to a live (current carrying) terminal.

Check with an electrician or qualified 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.

The power cord and plug specified under Circuit Requirements section on the previous page has an equipment-grounding wire and a grounding prong. The plug must only be inserted into a matching receptacle (outlet) that is properly installed and grounded in accordance with all local codes and ordinances (see Figure 8).

Grounded

 

Outlet Box

 

 

Current

 

Carrying

Grounding Pin

Blades

 

Figure 8. Typical NEMA 15-20 plug and receptacle.

Extension Cords

We do not recommend using an extension cord with this machine. If you must use an extension cord, only use it if absolutely necessary and only on a temporary basis.

Extension cords cause voltage drop, which may damage electrical components and shorten motor life. Voltage drop increases as the extension cord size gets longer and the gauge size get smaller (higher gauge numbers indicate smaller sizes).

Any extension cord used with this machine must contain a ground wire, match the required plug and receptacle, and meet the following requirements:

Minimum Gauge Size............................12 AWG

Maximum Length (Shorter is Better) ....50 ft.

Phase Converter

DO NOT use a static phase converter to create 3-phase power—it can quickly decrease the life of electrical components on this machine. If you must use a phase converter, only use a rotary phase converter and connect the manufactured leg to the 3L2 terminal of the master power switch (refer to the Upper Electrical Cabinet Wiring Diagram on Page 91).

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Southbend SB1051 owner manual Grounding Requirements, Extension Cords, Phase Converter