Hobart OM-303 manual Correct Installation, Metal Building Requirements

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8-3. Correct Installation

3	50 ft
	(15 m)

Weld Zone

7

50ft

(15 m)

5

6

8

1

2

8

4

Ground all metal ob- jects and all wiring in welding zone using #12 AWG wire.

Nonmetal

Building

Ground workpiece if required by codes.

11

9

Metal Building

8

8

10

Ref. S-0695 / Ref. S-0695

1High-Frequency Source (welding power source with built-in HF or separate HF unit)

Ground metal machine case, work output terminal, line disconnect device, input supply, and worktable.

2 Center Point of Welding Zone

Midpoint between high-frequency source and welding torch.

3 Welding Zone

A circle 50 ft (15 m) from center point in all directions.

4 Weld Output Cables

Keep cables short and close together.

5 Conduit Joint Bonding and Grounding

Electrically join (bond) all conduit sections using copper straps or braided wire. Ground conduit every 50 ft (15 m).

6 Water Pipes and Fixtures

Ground water pipes every 50 ft (15 m).

7 External Power or Telephone Lines

Locate high-frequency source at least 50 ft (15 m) away from power and phone lines.

8 Grounding Rod

Consult the National Electrical Code for spec- ifications.

Metal Building Requirements

9 Metal Building Panel Bonding Methods

Bolt or weld building panels together, install copper straps or braided wire across seams, and ground frame.

10 Windows and Doorways

Cover all windows and doorways with grounded copper screen of not more than 1/4 in (6.4 mm) mesh.

11 Overhead Door Track

Ground the track.

OM-303 Page 21

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Contents Description OM-303155795NProcesses From Hobart to You Table of Contents Page Marks a special safety message Symbol UsageArc Welding Hazards Electric Shock can killWelding can cause fire or explosion ARC Rays can burn eyes and skinFlying Metal can injure eyes Buildup of GAS can injure or killPrincipal Safety Standards About Pacemakers EMF InformationConsignes DE Securite Lire Avant Utilisation Signification des symbolesUN Choc É Lectrique peut tuer LES Fumé ES ET LES GAZ peuvent ê tre dangereuxDES Particules Volantes peuvent blesser les yeux LE Soudage peut provoquer un incendie ou une explosionLE Bruit peut affecter l’ouïe LA Chute DE L’APPAREIL peut blesser Risque D’INCENDIE OU’EMPLOI Excessif peut DES Organes Mobiles peuvent provoquer des blessuresInformation sur les champs é lectromagné tiques Principales normes de sé curitéConsignes relatives aux stimulateurs cardiaques Definitions General Precautionary LabelIntroduction Symbols And DefinitionsIncluded with Your Unit Duty Cycle Chart SpecificationsVolt-Ampere Curves Hertz ModelsTurn Off power before mak- ing connections InstallationSelecting a Location Typical Stick ConnectionsTypical TIG Connections Connecting Input Power Electrical Service GuideControls OperationExample of Remote Amperage Control Example of Front Panel Amperage ControlGtaw Welding Amperage Range AC Low AC HighProcess and Material Thickness Guide Label Routine Maintenance Maintenance and TroubleshootingTroubleshooting Circuit Diagram Electrical DiagramsHigh Frequency Incorrect InstallationWelding Processes Requiring High Frequency Weld ZoneMetal Building Correct InstallationMetal Building Requirements Main Assembly Parts ListDia Part Description Mkgs Quantity Figure -1. Main Assembly Page Page Support ServiceHobart Welding Products Contact your Distributor for