PAGE 143 Flashcards
What is the purpose of SANS 10142?
Regulations regarding motor drives from the Electrical Code of Practice
SANS 10142 outlines safety standards for electrical installations in South Africa.
What are the types of mounting methods for installation?
A foot mount, flange mount or a combination of the two
Different mounting methods are used based on the application and space requirements.
What is the significance of current-carrying capacity?
Prevents damage to conductors due to overloading
It is crucial to ensure that conductors can handle the electrical load without overheating.
According to SANS, what should the nominal cross-sectional area of conductors be based on?
The maximum estimated load to be carried by the conductors
This ensures that the conductors can safely handle the current without exceeding their capacity.
What is the full thermal current rating of a cable?
The tabulated current-carrying capacity relates to continuous loading
It corresponds to the conductor operating temperature indicated in the relevant tables.
Fill in the blank: The current-carrying capacity of conductors may be ______ in certain conditions.
reduced
This can occur due to various factors, including the design of the circuit.
True or False: A circuit can only be split into two branches with conductors of full current-carrying capacity.
False
A circuit may be split into branches with conductors of reduced current-carrying capacity.
What is required for the conductors supplying motor control and main circuits?
Conductors of a specific cross-sectional area
This is essential to safely carry the current to the motors and control circuits.
What does the regulation state about current-carrying capacity in a circuit with multiple spurs?
One or more spurs may have conductors of reduced current-carrying capacity
This allows for flexibility in circuit design while maintaining safety.
