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—Threshold Limit Values (Booklet) -6 H8151 230V Mini Welder H8151 230V Mini Welder -7- SECTION 2: CIRCUIT REQUIREMENTS Circuit Requirements Amperage Draw The Model H8151 welder draws the following amps under maximum load: Draw at 220V ......................................... 24 Amps Circuit Requirements Connect your welder to a dedicated and grounded circuit that is rated for the amperage given below. Never replace a circuit breaker on an existing circuit with one of higher amperage without consulting a qualified electrician to ensure compliance with wiring codes. If you are unsure about the wiring codes in your area or you plan to connect your machine to a shared circuit, consult a qualified electrician. Minimum 220V Circuit Requirement ..... 30 Amps Plug/Receptacle Type Recommended Plug/Receptacle ....NEMA L6-30 Serious personal injury could occur if you connect the machine to the power source before you have completed the set up process. DO NOT connect the machine to the power source until instructed to do so. 220V Operation Grounding In the event of an electrical short, grounding reduces the risk of electric shock. The grounding wire in the power cord must be properly connected to the grounding prong on the plug; likewise, the outlet must be properly installed and grounded. All electrical connections must be made in accordance with local codes and ordinances. Electrocution or fire could result if this machine is not grounded correctly or if your electrical configuration does not comply with local and state codes. Ensure compliance by checking with a qualified electrician! Extension Cords We do not recommend the use of extension cords. Instead, arrange the placement of your equipment and the installed wiring to eliminate the need for extension cords. If you find it absolutely necessary to use an extension cord at 220V with your machine: • Use at least a 10 gauge cord that does not exceed 50 feet in length. • The extension cord must also contain a ground wire and plug pin. • A qualified electrician MUST size cords over 50 feet long to prevent motor damage. Figure 3. NEMA L6-30 plug and receptacle. Grounding for Arc Welding Safety There are two or more electrical circuits involved in any welding operation. The practice of safely grounding these circuits is documented in various codes and standards (refer to Additional Sources for Welding Codes and Standards on Page 6). Welding Machine Ground When properly connected to a power source, the Model H8151 welder is grounded through the power cord and power grid. The welder's internal welding circuit is insulated from the external enclosure. However, to avoid shocking hazards in the event that this internal insulation should fail, you must establish a separate earth ground for the welder's external enclosure. This will ensure that the metal enclosure of the welder and the internal welding circuit are at the same electrical potential. Note: Refer to the publication NFPA 70, National Electric Code, Article 250, Grounding, and your local electrical codes for the correct method of establishing this ground. The grounding terminal for the H8151 external enclosure is located on the right rear of the welder (see Figure 4). Figure 4.Location of external enclosure grounding terminal on the rear of the Model H8151. Workpiece Ground The incoming power circuit to the welder and the welding circuit are two separate circuits that must have separate grounds. The welding circuit consists of the internal components of the welder, the welding cables, the electrode holder, the work clamp, and the workpiece. In the publication Safety in Welding, Cutting, and Allied Processes, ANSI Publication Z49.1, 11.3.2.1, it is specified that "Grounding [of the workpiece] shall be done by locating the work on a grounded metal floor or platen, or by connection to a grounded building frame or other satisfactory ground." Always ensure that the ground for the incom- ing power circuit to the welder and the ground for the welding circuit are never con- nected. Failure to comply with this warning could result in serious property damage, personal injury, or death. However, you must also avoid "double grounding" of the workpiece. The ANSI Publication Z49.1 publication warns that "Care shall be taken to avoid the flow of welding current through a connection intended only for safety grounding since the welding current may be of a higher magnitude than the grounding conductor can safely carry." Note: The work lead from the welder is sometimes incorrectly referred to as the "ground lead." The work lead from the welder is NOT a ground. The work lead and the ground connection to the workpiece are separate and must NOT be connected in any way. -8 H8151 230V Mini Welder SECTION 3: INVENTORY The Model H8151 was carefully packed when it left our warehouse. If you discover the machine is damaged or a part is missing after you have signed for delivery, please immediately call Customer Service at (570) 546-9663 for a...

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