101 Basic Series - Module 13 - CEU Education
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When planning for future expansion, if a customer asks for a protective device to be bolted into place and connected to the bus for a future load, this device is called a ___________.
None of the above
The neutral in a distribution panel is connected to the ground.
Surface-mount panelboards are generally used in industrial buildings, and basements of offices and commercial buildings.
A top- mounted, blank enclosure with space to pull cable is called a ________.
The ______ is an NEC ruling which states that you must be able to throw no more than six handles into the off position to disconnect all electrical service.
Six section surge rule
Six withstand rule
Six disconnect rule
None of the above
The rating that defines the current the protective device (fuse or circuit breaker) can interrupt safely is the _______ rating.
A single IFS switchboard section can contain both a panelboard and a dry type transformer.
If the depth of the service section is deeper than the distribution section, the installation is referred to as Front Alignment.
A panelboard's bus bars can accommodate up to 1200A while a loadcenter is typically rated 200A.
Switchboards are expandable devices, while panelboards are not.
A panelboard can serve as a distribution point, receiving power from a panelboard or switchboard upstream.
The NEC defines, prior to 2008, a lighting and appliance panelboard as having a maximum of 42 circuits (poles), at least 10% of the overcurrent devices at 30A or below, with neutral connections provided.
If throwing more than ____ handles is required to disconnect all electrical service, an upstream main overcurrent protective device must be provided to cut all the branch circuits at once.
What are the vertical and horizontal conductors called in a switchboard?
None of the Above
For safety reasons, the NEC requires the service entrance panel's neutral to be grounded. Any downstream panels have their neutral _____. (except on separately derived systems)
A ground fault can occur from water splashing an electrical appliance or outlet.
Bus bars move power between two or more components or circuits of a switchboard.
This section divides power among branch circuit protection devices.
A panelboard is used in commercial and industrial applications while a loadcenter is primarily used in residential applications.
The device that provides a termination point for neutral wires from both the incoming service and the load is the _____.
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