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Training presentations

PowerPoint presentations to increase your knowledge

The presentations below are available to presenters and learners alike. They cover a variety of subjects involving electrical distribution systems, ratings, components, codes, and standards.

For complete information on each slide, please view the presenter notes.

Application considerations 200KB

Learn about the application considerations of an electrical system based upon roles: owners, architects, electrical engineers, contractors, electricians, electrical inspectors, workers/maintenance workers, insurance companies.

Types of overcurrents and calculations 394KB

Learn about overcurrent events and how to calculate their typical values.

Types of overcurrent protective devices 1.9MB

Learn about the types of overcurrent protective devices (fuses and circuit breakers) and how they operate to protect a circuit.

Voltage ratings 1.3MB

Learn about overcurrent protective device voltage ratings and how they affect application decisions.

Interrupting ratings 6.6MB

Learn why interrupting ratings are the highest current levels at rated voltage that devices are identified to interrupt under standard test conditions.

Series rated systems 1MB

Learn about the three ratings that must be observed for proper applications of overcurrent protective devices and two methods of achieving adequate interrupting ratings for fully rated and series rated systems, along with common misunderstandings surrounding series rated systems.

Current limitation 347KB

Learn why the degree of current-limitation, and protection, depends upon the type of current-limiting overcurrent protective device selected (circuit breaker or fuse).

Component protection 640KB

Learn why electrical system components must be applied within their short-circuit current ratings, or be destroyed if the overcurrent protective devices do not limit the short-circuit current to within the short-circuit current rating of the system’s components.

Selective coordination background - why it exists 2.3MB

Learn why selective coordination is a mandatory requirement in the National Electrical Code to increase system reliability for delivering power to vital loads.

Selective coordination basics 3MB

Learn about selective coordination and the sections of the 2014 NEC that require “selective coordination” for fuses and circuit breakers on specific systems, and special requirements for “coordination” in Healthcare facilities.

Ground fault protection 815KB

Learn about ground faults and why they are a special form of short circuit. All ground faults are short circuits, but not all short circuits are ground faults.

Elevator codes and standards 1.6MB

Learn about the codes and standards applicable to the installation and operation of elevators.

Motor and motor circuit protection 616KB

Learn how a motor circuit operates and how to protect the components involved in the motor circuit from overloads and short circuits.

Short-circuit current ratings 3MB

Learn about short-circuit current ratings of components that identify the maximum short-circuit current to which the components can be applied. In some cases, the short-circuit current is dependent upon a specific type and size of overcurrent protective device.

Key 2014 NEC® changes affecting overcurrent protection 3.6MB

Learn the key changes to the 2014 NEC that affect overcurrent protection.

Learn more

For additional information on these subjects and more, see the Bussmann Division's handbook Selecting Protective Devices (SPD) No. 3002. Click here for the web page.