Electrician Course: T&T Wiring Code

• The document is the Table of Specifications for the Electrician course NEC/T&T Wiring Code & Drawing, spanning 90 hours.
• There are 30 questions in the exam.

Introduction to T&T Wiring Code and General Rules

• Aim is to explain the purpose of the T&T Wiring Code Low Voltage Part 1.
• The procedures for the acceptance of the T&T Wiring Code by the Electrical Inspectorate will be described.
• There will be a function description of the T&T Bureau of Standards.
• The organizational layout of the T&T Wiring Code Low Voltage Part 1 and the NEC Code will be described.
• It also involves locating specific information in the T&T Wiring Code and the NEC Codes.
• The people responsible for an electrical installation will be identified.

Conductor Material and Sizes / Colour Codes

• Application of specific rules to determine conductor sizes, using tables and appendices.
• Determination of the allowable ampacity of a conductor given load current and conditions of use.
• Determination of the allowable ampacity of flexible cords and equipment wire and conditions of use.
• Identification of neutral conductors and determination of their size.
• There will be a statement of the NEC/ T&T standards for conductor colors.
• Colors must be identified according to the TTBS Electrical codes.
• Color codes will be applied to Electrical Wiring Installations in accordance to the TTBS Electrical codes.

Service Entrance and Grounding

• There will be definitions of specific terms for service and service equipment that apply to a residential occupancy.
• The wiring methods used for the installation of overhead services will be described.
• The wiring methods used for the installation of underground services will be described.
• An outline of the requirements for service equipment in a single dwelling.
• Definitions of specific terms from grounding and bonding that apply to a single dwelling.
• Grounding and bonding requirements for a single dwelling will be determined.

Service Feeders and Branch Circuits Final Sub-Circuit

• Specific terms that apply to a residential occupancy will be defined.
• The minimum ampacity of service or feeder conductors supplying a single dwelling will be determined.
• The minimum required number of branch circuit positions for a single dwelling will be calculated.
• Ampacity requirements for branch circuit conductors and ampere ratings of overcurrent devices applicable to a single dwelling, will be determined.

Installation of Electrical Equipment

• There will be a description of the information required when selecting a receptacle for a specific application.
• Branch circuit requirements must be determined, as well as the number and location of receptacles required for areas (other than kitchens) of a residential occupancy in general and specifically, a single dwelling.
• There are descriptions of the operation and applications of GFCIs and AFCIs.
• Branch circuits required, the number and type of receptacles required and the location will be determined.
• The location where the disconnecting means for a furnace must be installed will be determined.

Installation of Lighting Equipment

• Specific terms in the lighting industry will be defined.
• Descriptions will be given on the different types of electric lighting sources.
• There will be definitions of specific terms that apply to the first period code program.
• There will be a description of the general requirements for interior lighting equipment.
• Factors relating to the location and installation of lighting equipment will be described.
• Methods of wiring various types of lighting equipment will also be described.
• The bonding requirements of lighting equipment will be described.
• Ratings and control methods of lamp holders will be identified.

Domestic and Commercial Circuits

• Basic terms applying to circuits must be identifed.
• Requirements for Class 1 and Class 2 circuits must be determined.
• The Class 2 circuits in a typical single dwelling must be identified.

Orthographic Projection and Diagrams

• Descriptions of basic views of objects employing orthographic projection.
• Identification of basic orthographic projections to views of a building.
• Identification of the lines found on a drawing.
• There will be a description of a block diagram and a wiring diagram.
• Electrical schematic drawings must be interpreted.

Drawings

• Dimensions from a drawing must be interpreted.
• Dimensions from a drawing using the scale must be determined.
• Electrical symbols must be identified.
• Abbreviations used on drawings must be identified.
• Technical terms used on drawings must be interpreted.
• Descriptions of the different types of drawings and their uses in a set of construction drawings.
• Descriptions of the disciplines and types of drawings used in a set of construction drawings.

Drawings Interpretation

• Information from a drawing must be interpreted.
• Drawings of overhead or underground services for a single dwelling must be interpreted.
• Interpretations of partial floor plans of a typical residential electrical installation and creation of a material estimate.
• Main service requirements for a single dwelling must be calculated.