Hazardous Location Electrical Systems with Grounding & Bonding
National Technology Transfer, Inc.

Delivery Method

Seminar

Target Audience
Just some of the attendees will be Electricians, Mechanics, Environmental health & safety personnel, Apprentice and experienced HVAC technicians, Linemen & Utility Workers

Summary
Learn strong grounding and bonding fundamentals and performance requirements essential for electrical installation, design and inspection, while maintaining the highest level of electrical safety for persons and property.

Description/Agenda

Learn strong grounding and bonding fundamentals and performance requirements essential for electrical installation, design and inspection, while maintaining the highest level of electrical safety for persons and property. Learn about grounding requirements as they relate to Article 250 and other articles of the National Electrical Code® (NEC). Installation, testing and inspection procedures for industrial, commercial, institutional and residential power systems are covered. Learn the rules to minimize the risk of electricity as a source of electric shock, and as an ignition source of fires and explosions.

Identify hazardous zones, learn codes, standards and certification requirements. Articles 500 through 504, and 510 through 513 provide classification and installation standards for the use of electrical equipment in the three classified hazardous locations: type, condition and nature.

Also learn about design issues, proper grounding and bonding, safe wiring methods and maintenance techniques.

What You Will Learn

Topics covered during this training include:

Hazardous Locations

• Basic installation requirements
• Hazardous location identification
• Design issues
• Grounding and bonding
• Codes, standards, certification, and marking
• Other protective schemes
• Wiring methods
• Maintenance

Grounding & Bonding

• Establish strong grounding and bonding fundamentals and performance requirements essential for electrical installation, design and inspection, while maintaining the highest level of electrical safety for persons and property.
• Learn about grounding requirements as they relate to Article 250 and other articles of the National Electrical Code® (NEC). Installation, testing and inspection procedures for industrial, commercial, institutional and residential power systems are covered along with rules to minimize the risk of electricity as a source of electric shock, and as an ignition source of fires and explosions.

Workshop Agenda

GROUNDING AND BONDING

• Fundamentals of grounding (earthing) and bonding
• When to ground (earth), when not to grounds (earth)
• Grounding (earthing) of electrical systems
• Separately derived system equipment and man bonding jumpers
• Grounding (earthing) electrodes and an electrode system
• Grounding (earthing) electrode conductors
• Bonding enclosures and equipment
• Equipment grounding (bonding) conductors
• Enclosure and equipment grounding (bonding)
• Clearing ground (earth) faults and short circuits
• Grounding (earthing) separately derived systems
• Grounding (earthing) at (feeder supplied)separate structures
• Ground-fault protection for equipment
• Grounding (earthing) and bonding for hazardous locations
• Low-voltage and intersystemgrounding (earthing) and bonding
• Grounding (earthing) and bonding for over 600-volt systems
• Grounding (earthing) cathodic protection systems
• Grounding (earthing) and lightning considerations

HAZARDOUS LOCATIONS

WHAT IS A CLASSIFIED LOCATION

• Classification of area locations -- Class I, II, III
• Division and zone systems, IEC
• Groups within class, division and zone

RULES

• National Electrical Code and other related standards

HAZARDOUS TRIANGLE

• Air, fuel and ignition sources

COMPARISON OF DIFFERENT AREAS AND THEIR CLASSIFICATIONS

• Classification of area locations -- Class I, II, III
• Multiple classifications

WIRING METHODS AND EQUIPMENT PROTECTION SYSTEMS

• General information
• Division and zone systems
• Conduits and cables
• Seals
• Explosion and flame proof
• Intrinsically safe and nonincendive circuits
• Oil immersion, sealed, purged and pressurized systems

HAZARDOUS LOCATION IDENTIFICATION

• Determining the presence and quantity
  • Requirements for combustion
  • Vapor density
  • Flashpoint
  • Auto ignition temperatures
  • Upper and lower flammable limitsClass, division and zones
• Gas groups
• "T" codes
• Ingress protection and NEMA ratings
• Area classification diagram development
• Classroom exercises
  • Determine classified areas from drawings
  • Select proper equipment for hazardous area

DESIGNING TO AVOID ELECTRICAL EQUIPMENT IN CLASSIFIED AREAS

• Purged, pressurized and ventilated equipment and spaces, AEx "p"
• Symbols AEx, EEx and Ex
• Explosion proof and flame proof AEx "d"
• Increased safety AEx "e"
• Non-incendiary AEx "n", "nA", "nC" ,"nR"
• Intrinsically safe AEx "ia" and "ib"
• Dielectric filled or encapsulated AEx "m", "ma", "mb", "o" or "q"
• Equipment with special protection AEx "s"
• Combined or hybrid protection
• Understanding equipment markings

WIRING METHODS IN CLASSIFIED AREAS

• Conduit seals
• Wiring methods
  • Flexible cords and cables
  • Conduits and wire ways
• Equipment in class/division
  • Transformers and capacitors
  • Motors and generators
  • Light fixtures
  • Heaters
• Wiring methods in zone system
  • Disconnect requirements
  • Supports
  • Cable transits, multi-cable and parallel single conductors

BASIC REQUIREMENTS FOR ELECTRICAL INSTALLATIONS IN CLASSIFIED AND NON-CLASSIFIED AREAS

• Conductors
• Over-current devices
• Conductors operation temperatures
• Conductor and equipment for different applications
  • Armored, unarmored
  • Fire retarded, fire resistant
  • IS cables
• Equipment's ability to interrupt normal and fault currents
• Coordination of Over Current Protective Devices (OCPD) and other circuit components
• Termination requirements for temperature, clearances and voltage
• Mechanical execution of work
• Clearance requirements

MAINTENANCE OF ELECTRICAL EQUIPMENT IN HAZARDOUS AREAS

• Universal issues
  • Documentation
  • Inspections
  • Confined entry
• Local issues
• Class, division and zones
• Gas groups
• "T" codes
• Ingress protection and NEMA ratings
• Area classification diagram development
• Classroom exercises
  • Determine classified areas from drawings
  • Select proper equipment for hazardous area

Who Should Attend

People who will benefit from attending this course include:

• Electricians
• Mechanics
• Environmental health & safety personnel
• Apprentice and experienced HVAC technicians
• Supervisors working on or who oversee employees working on 50V or greater equipment
• Linemen & Utility workers
• Owners & managers
• Maintenance Technicians
• Fire Alarm Technicians
• Plant & facility maintenance technicians
• Building engineers
• Building managers & superintendents
• Plant & facility managers
• Stationary engineers
• Safety directors

All Date/Location Information