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NEMA US 80016-2025 Meter Socket Adapters, 2025
- 1 Referenced Standards and Definitions [Go to Page]
- 1.1 Referenced Standards
- 1.2 Definitions [Go to Page]
- AC/DC GENERATOR-RECTIFIER ARC WELDING POWER SOURCE An ac/dc generator-rectifier arc welding power source is a combination of an alternating current generator and static rectifiers with the associated control and indicating devices required to produce ...
- AC TRANSFORMER ARC WELDING POWER SOURCE An ac transformer arc welding power source utilizes a transformer having isolated primary and secondary windings with the associated control and indicating devices required to produce an alternating current suit...
- AC/DC TRANSFORMER-RECTIFIER ARC WELDING POWER SOURCE An ac/dc transformer-rectifier arc welding power source is a combination of a transformer, having isolated primary and secondary windings, and static rectifiers with the associated control and indic...
- ASSOCIATED ELECTRICAL ATTACHMENTS Associated electrical attachments are those electrical controls, cables, accessories, and such, attached to the arc welding power source to facilitate control, function, or operation and that are external to the power...
- AUXILIARY POWER SUPPLY An auxiliary power supply is a separate source of power available to the operator, which is provided by the arc welding power source for purposes other than supplying power to the welding arc.
- CONSTANT CURRENT ARC WELDING POWER SOURCE A constant current arc welding power source is a power source that has means for adjusting the load current and that has a static volt ampere curve that tends to produce a relatively constant load current. The...
- CONSTANT CURRENT/CONSTANT VOLTAGE ARC WELDING POWER SOURCE A constant current/constant voltage arc welding power source is a power source that has the selectable characteristics of a constant current arc welding power source or constant voltage arc we...
- CONSTANT VOLTAGE ARC WELDING POWER SOURCE A constant voltage arc welding power source is a power source which has means for adjusting the load voltage and has a static volt ampere curve that produces a relatively constant load voltage. The load curren...
- DC GENERATOR ARC WELDING POWER SOURCE A dc generator arc welding power source is a dc generator with the associated control and indicating devices required to produce direct current suitable for arc welding.
- DC GENERATOR-RECTIFIER ARC WELDING POWER SOURCE A dc generator-rectifier arc welding power source is a combination of an ac generator and static rectifiers with the associated control and indicating devices required to produce direct current suitable ...
- DC TRANSFORMER-RECTIFIER ARC WELDING POWER SOURCE A dc transformer-rectifier arc welding power source is a combination of a transformer, having isolated primary and secondary windings, and static rectifiers with the associated control and indicating d...
- DUTY CYCLE Duty cycle, expressed in percent, is the ratio of arc time to total time. For the purpose of these standards, the time period of one complete test cycle shall be 10 minutes. (For example, in the case of a 60% duty cycle, load shall be appli...
- EFFICIENCY The efficiency of an arc welding power source is the ratio of the power output at the welding terminals to the total power input. Unless otherwise specified, the efficiency shall be given when the power source is operated at rated output.
- ENCLOSURE An arc welding power source enclosure is the surrounding case or housing constructed to provide a degree of protection to personnel against incidental contact with energized and moving parts and to provide a degree of protection to the power...
- ENGINE GENERATOR ARC WELDING POWER SOURCE An engine generator arc welding power source is a power source that consists of an engine mechanically connected to, and mounted with, one or more arc welding generators.
- FRAME The frame of an arc welding power source is a supporting structure provided to increase the strength and rigidity of the enclosure, and to provide means for mounting the various parts of the power source, or both.
- HANDHELD ASSEMBLY An assembly or device that is designed to be supported and manipulated by hand during use.
- HIGH FREQUENCY STABILIZED ARC WELDING POWER SOURCE A high frequency stabilized arc welding power source is a constant current arc welding power source that includes a high-frequency arc stabilizer as an integral part of the power source and the suitab...
- INPUT CURRENT Input current is the amperage drawn from the electrical power supply to operate an arc welding power source.
- INPUT RATING For an arc welding power source operating from an electrical power supply, the input rating consists of the rated input voltage(s), number of phases, rated frequency(s), and the input current when the power source is delivering rated output.
- JACK A female contact device designed to mate with a jack plug to establish an electrical connection.
- JACK PLUG A male device, usually associated with welding lead(s), that is inserted into a jack to establish an electrical connection of the welding circuit.
- LIVE PART A live part is a part at a potential different from ground, which could render an electrical shock.
- LOAD CURRENT The load current is the amperage flowing in the welding circuit when a load is applied to the welding terminals.
- LOAD VOLTAGE Load voltage is the voltage between the welding terminals of the arc welding power source when load current is flowing in the welding circuit.
- MOTOR GENERATOR ARC WELDING POWER SOURCE A motor generator arc welding power source is a power source that consists of an electric motor mechanically connected to and mounted with one or more arc welding generators.
- MULTIPLE OPERATOR ARC WELDING POWER SOURCE A multiple operator arc welding power source is a power source that supplies two or more welding arcs through suitable output control devices without objectionable arc interaction.
- MULTIPLE OPERATOR WELDING OUTLET A multiple operator welding outlet is a control station containing an adjustable output control device for adjusting load current supplied from a multiple operator arc welding power source.
- NEMA CLASS I ARC WELDING POWER SOURCE A NEMA Class I arc welding power source is characterized by its ability to deliver rated output at duty cycles of 60, 80, or 100%. If a power source is manufactured in accordance with the applicable standards for ...
- A NEMA Class I arc welding power source is a completely assembled arc welding power source that is composed of the characteristics listed below:
- NEMA CLASS II ARC WELDING POWER SOURCE A NEMA Class II arc welding power source is characterized by its ability to deliver rated output at duty cycles of 30, 40, or 50%. If a power source is manufactured in accordance with the applicable standards for...
- A NEMA Class II arc welding power source is a completely assembled arc welding power source which is composed of the characteristics listed below:
- NEMA CLASS III ARC WELDING POWER SOURCE A NEMA Class III arc welding power source is characterized by its ability to deliver rated output at a duty cycle of 20%. If a power source is manufactured in accordance with the applicable standards for Class I...
- A NEMA Class III arc welding power source is a completely assembled arc welding power source that is composed of the characteristics listed below:
- OPEN CIRCUIT VOLTAGE Open circuit voltage is the voltage, excluding high frequency stabilization voltage, between the welding terminals of the arc welding power source when no load current is flowing in the welding circuit.
- PERCENT RIPPLE VOLTAGE Percent ripple voltage is the ratio, expressed as a percentage, of the effective (root mean square) value of the ripple voltage to the average value of a pulsating unidirectional voltage. The root-mean-square value of the ripple...
- RATED FREQUENCY Rated frequency (expressed in hertz) is the supply voltage frequency at which an arc welding power source is designed to operate.
- RATED INPUT VOLTAGE The rated input voltage is the supply voltage(s) at which an arc welding power source is designed to operate.
- RATED LOAD CURRENT The rated load current is the load current at rated output.
- RATED LOAD SPEED The rated load speed of an arc welding power source is the rotational speed at which an arc welding generator is designed to operate when delivering rated output.
- RATED LOAD VOLTAGE Rated load voltage is the load voltage at rated output.
- RATED OUTPUT The rated output of an arc welding power source shall consist of a designated limit of output or capacity expressed as rated load voltage, rated load current, and rated duty cycle when the power source is operated at rated input voltage(s...
- SERVICE LINE HOSES Service line hoses are the hoses to or from an arc welding power source, including connectors, supplying shielding medium, cooling medium, and providing means for fume removal, and/or nonelectrical power or control.
- SINGLE OPERATOR ARC WELDING POWER SOURCE A single operator arc welding power source is a power source which is designed to deliver load current to only one welding arc.
- SLOPE OF THE STATIC VOLT AMPERE CURVE The slope of the static volt ampere curve is the ratio of load voltage change to the change in load current expressed in volts per 100 amperes.
- STATIC VOLT AMPERE CHARACTERISTICS The static volt ampere characteristics is the curve or family of curves which gives the steady state load voltage of an arc welding power source as ordinate, plotted against the steady state load current as abscissa.
- WELDING CIRCUIT The welding circuit consists of all attachments connected to the welding terminals of the arc welding power source.
- WELDING LEADS Welding leads conduct the welding power and, when provided, high frequency energy from the welding terminals to the welding arc. [Go to Page]
- WELDING TERMINALS Welding terminals are those terminals of an arc welding power source which furnish welding power and, when provided, high frequency energy for the welding arc.
- WORK LEAD A work lead is the welding lead between one of the welding terminals of the arc welding power source and the work.
- 2 General [Go to Page]
- 2.1 Suitability of Operation
- 2.2 Service Conditions
- 2.3 Usual Service Conditions
- 2.4 Unusual Service Conditions
- 2.5 Installation and Operation
- 3 Construction Requirements—Mechanical Considerations [Go to Page]
- 3.1 Frame and Enclosure
- 3.2 Enclosure Construction
- 3.3 Openings in Enclosures [Go to Page]
- 3.3.1 Openings in Other Than Hand-Held Arc Welding Power Source Assemblies [Go to Page]
- 2. An opening that will permit entrance of a 0.750 inch (19 mm) diameter rod shall be suitable if there is no film-coated wire, uninsulated live part(s), hazardous moving part(s), or any combination thereof; (1) less than X inches (X mm) from the peri...
- 3.3.2 Openings in Hand-Held Arc Welding Power Source Assemblies
- 3.3.3 Openings in Engine- or Motor-Driven Power Sources
- 3.4 Corrosion Protection
- 3.5 Service Line Hoses
- 3.6 Water Cooling
- 3.7 Brushes
- 3.8 Jerk and Drop Tests [Go to Page]
- 3.4
- 3.5
- 3.6
- 3.7
- 3.8
- 3.8.1 Jerk Test
- 3.8.2 Drop Test
- 3.8.3 Test Conformance
- 3.9 Stacking of Arc Welding Power Sources
- 4 Construction Requirements—Electrical Considerations [Go to Page]
- 4.1 Power Supply Connection—General [Go to Page]
- Where:
- 4.2 Power Supply by Flexible Cord
- 4.3 Power Supply by Permanent Wiring System
- 4.4 Grounding
- 4.5 Corrosion Protection
- 4.6 Output Provisions [Go to Page]
- 4
- 4.3
- 4.4
- 4.5
- 4.6
- 4.6.1 Welding Leads
- 4.6.2 Welding Terminals
- 4.7 Internal Wiring Requirements [Go to Page]
- 4.7
- 4.7.1 Insulated Conductors
- 4.7.2 Uninsulated Conductors
- 4.7.3 Insulating of Live Parts
- 4.8 Spacings
- 4.9 Classification of Insulation Systems
- 4.10 Requirements for Specific Components [Go to Page]
- 4.8
- 4.9
- 4.10
- 4.10.1 Transformers
- 4.10.2 Capacitors
- 4.10.3 Switches and Control Devices
- 4.10.4 Operating Controls
- 4.10.5 Marking of Connections and Operating Controls
- 4.11 Output Regulating Taps
- 4.12 Auxiliary Power Supply [Go to Page]
- 4.11
- 4.12
- 4.12.1 Receptacles
- 4.12.2 Protection
- 4.12.3 Auxiliary Power Supply Circuit
- 4.13 Short Circuit of Welding Circuit
- 5 Rating and Performance [Go to Page]
- 5.1 Input Rating of Arc Welding Power Sources Operating from Electrical Power Supplies
- 5.2 Power Factor Correction
- 5.3 Open Circuit Voltage [Go to Page]
- 5
- 5.3
- 5.3.1 Manual and Semiautomatic Arc Welding Power Sources
- 5.3.2 Automatic Arc Welding Power Sources
- 5.4 Output Ratings of Constant Current NEMA Class I Arc Welding Power Sources [Go to Page]
- 5.4.1 General
- 5.4.2 AC or DC Arc Welding Power Sources
- 5.4
- 5.4.1
- 5.4.2
- 5.4.3 AC/DC Arc Welding Power Sources
- 5.5 Output Ratings of Constant Current NEMA Class II Arc Welding Power Sources [Go to Page]
- 5.5
- 5.5.1 General
- 5.5.2 AC or DC Arc Welding Power Sources
- 5.5.3 AC/DC Arc Welding Power Sources
- 5.6 Output Ratings of Constant Current NEMA Class Ill Arc Welding Power Sources
- 5.7 Output Ratings of Constant Voltage, NEMA Class I Arc Welding Power Sources
- 5.8 No Load Operation
- 5.9 Temperature Rise
- 5.10 Nameplate Marking
- 6 Temperature Tests [Go to Page]
- 6.1 Testing Procedures for Arc Welding Power Sources
- 6.2 Thermometer Method of Temperature Determination [Go to Page]
- 6.2.1 Definition
- 6.2.2 Measurement
- 6.3 Resistance Method of Temperature Determination [Go to Page]
- 6.3
- 6.3.1 Definition
- 6.3.2 Measurement
- 6.3.3 Determination of Average Measured Temperature by the Resistance Method
- 6.4 Applied Thermocouple Method of Temperature Determination [Go to Page]
- 6.4
- 6.4.1 Definition
- 6.4.2 Measurement
- 6.5 Determination of Ambient Temperature
- 6.6 Cooling Air Temperature During Tests
- 6.7 Omission of Temperature Teston Duplicate Apparatus
- 6.8 Correction of Temperature to Time of Shutdown
- 6.9 Stopping Generator-Type Power Sources for Temperature Tests
- 7 High Potential Tests [Go to Page]
- 7.1 High Potential Tests
- 7.2 Test Voltage
- 7.3 Duration of Application of Test Voltage
- 7.4 Points of Application of Test Voltage
- 7.5 Temperature at Which High Potential Tests Are to Be Made
- 7.6 High Potential Test Procedure for Components and Accessories
- 7.7 Production Line High Potential Testing
- 8 Efficiency and Power Factor [Go to Page]
- 8.1 Method Of Determining Efficiency and Power Factor [Go to Page]
- 8.1.1 Conditions for Test
- 8.1.2 Efficiency
- 8.1.3 Input Power Factor
- 9 Power Sources to Be Used with Gas Tungsten Arc Welding [Go to Page]
- 9.1 General
- 9.2 Definitions [Go to Page]
- 9.2.1 Gas Tungsten Arc Welding (GTAW)
- 9.2.2 Shielding Gas
- 9.3 Volt Ampere Relationship for GTAW
- 9.4 Categories of GTAW Power Sources [Go to Page]
- 9.4.1 GTAW power sources shall be categorized by one of the following:
- 9.4.2 DC Power Sources
- 9.4.3 AC Power Sources
- 9.4.4 AC/DC Power Sources
- 9.5 Nameplate Marking
- 10 Arc Welding Power Sources with High Frequency Arc Starting and/or Stabilizing [Go to Page]
- 10.1 General
- 10.2 Definitions [Go to Page]
- 10.2.1 Conduction
- 10.2.2 High Frequency (HF)
- 10.2.3 High Frequency Stabilized Arc Welding (HFSAW)
- 10.2.4 Interference
- 10.2.5 Radiation
- 10.2.6 Welding Zone
- 10.3 HF Classification [Go to Page]
- 10.3.1 HF as an Integral Part (HFPS)
- 10.3.2 HF Supplied as a Separate Unit (HFAU)
- 10.3.3 Enclosure (HFPS or HFAU)
- 10.4 Radio Frequency Radiation [Go to Page]
- 10.4.1 General
- 10.4.2 Direct Radiation from the Power Source or HF Attachment Unit (HFAU)
- 10.4.3 Direct Radiation from the Welding Circuit
- 10.4.4 Conduction and Radiation from the Power Line
- 10.4.5 Reradiatlon
- 10.5 General Principles for Installation of High Frequency Stabilized Arc Welding Installations [Go to Page]
- 10.5.1 Primary Power Supply
- 10.5.2 Access Doors and Covers
- 10.5.3 Shielding of Miscellaneous Wiring in the Welding Zone
- 10.5.4 Miscellaneous Conducting Materials in the Welding Zone
- 10.5.5 Welding Circuit
- 10.5.6 Grounding of the Welding Circuit
- 10.5.7 Metal Buildings
- 10.6 Certification of HFSAW Installations [Go to Page]
- 10.6.1 Introduction
- 10.6.2 On-Site Certification
- 10.6.3 Prototype Certification
- 10.6.4 Test Procedure for Prototype Certification
- 10.6.4.1 Measurement of Field Strength
- 10.6.4.2 Measuring Instrument
- 10.6.4.3 Measuring Procedures
- 10.6.4.4 Manufacturer's Test Installation
- 10.6.5 Data Requirements and Limits
- 10.6.6 Interference [Go to Page]
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