NEC
This is the section of the NEC which requires occupants have access to their own service disconnecting means
what is 230.72 (C)?
Thes are the standard colors on three phase 120/240v system
What is black, red, blue?
The conductors between the service lateral/drop and the main disconnecting means
What is service conductors
Hospitals and healthcare facilities fall under this NEC artical
What is NEC 517
These are used to provide a place to tap the service entrance conductors or dist. or distribution feeders to supply the service disconnecting means, self contained metering equipment ...
What is a bussway?
This table tells you were to find the proper sized grounding electrode
what is table 250.66
Overhead services include this which is attached to the service mast and may be cast alum steel, or pvc
What is a weatherhead?
This is usually installed and sealed by the utility company
What is the meter?
The area around a magnet in which the effect in which the effect of the magnet is felt.
What is the magnetic field?
A load in which the maximum current is expected three hour or more
What is a continous load
This is were metal wireways are defined
What is 376.2
This installed at the point of entrance and is used to measure the electric usage
What is a Current transformer?
This is the rated load-carrying ability of generating equipment or other load carrying equipment.
What is capacity?
This section of the NEC pertains to hospitals.
What is NEC chapter 517?
This attachment provides a separation between the service drop and other metal components.
What is a porcelain insulator?
This section of the NEC lists the bonding the metal underground waterpipe in direct contact with the earth for 10 feet or more are required to be bonded.
What is NEC 250.52
Shows the location of the electrical service and the location of the distribution equipment and branch circuit panelboards.
What is the building layout.
This is the best test instrument to check for grounded windings
What is a megger?
This is how much you must size the overcurrent protective device the full load current of the overcurrent protective device.
What is 125%
This is the most common service voltage for small commercial and other small loads
What is 120/240v single phase three wire service?
This NEC article covers services and conductors
What is NEC article 230?
The overhead conductors between the electrical supply and the service point
Service point
A three phase transformer connection in which the terminals are connected in a triangular shape like the Greek symbol DElta
What is Delta connected?
This is the part of luminaires that redirect or scatter light produced by the luminair light
What is a diffuser?
It is important to follow these parties' requirements for torque when using mechanical lugs
What is the manufacture's requirements
This section of the NEC requires meter disconnects switch to be not rated more than 1000 volts
What is 230.82(3)?
Conductors and equipment for delivering electric energy from the serving utility to the wiring system of the premises served.
What is the service
These are the underground conductors between the utility main electric supply and the service point.
What is the service lateral?
A tubular raceway such as emt rigid metal conduit rigid non-metallic conduit, etc
What is conduit?
This static device consists of one or more windings with a magnetic core
What is a transformer?
According to this chapter in the NEC parallel conductors must be terminated in the samr manner
310.10(G)(2)(5)
I have 5 analog dials that indicate the amount of power has been used.
What is a watt hour meter?
This section of the NEC requires that a means of disconnect be provided to disconnect all ungrounded conductors in a building from the service entrance conductors
What is 230. 70
This exists when an unintended current path is established between a ungrounded conductor and a ground
What is a ground fault?
The two basic types of current transformers
What is the busbar and doughnut typs
This table gives you clearances over roofs, buildings and other structures.
What is Table 225.61?
The underground conductors between the main electrical supply and the service point
Service Lateral
This is an undesired electric discharge that travels through the air between conductors or from a conductor to a ground.”
What is a arc flash?
This is poured after the conduit system and seals are installed and the conductors and packing fiber have been installed.
What is sealing compound?
This type of metering allows the utility company to work on your metering equipment with the power being disconnected
What is cold sequence metering?
If the service mast is to support the service drop it must be well secured per this section of the NEC
What is 230.28?
This is the simplest symbolic representation of an electric power system
What is a one line diagram?
This device is used to provide a single point of control to disconnect electrical power to the entire building, ensuring safety during maintenance, emergencies, or when the building is unoccupied.
What is the main disconnect?
Open core, closed core, and shell type.
What are the three types of iron cores of transformers?
All electrical service distribution equipment is labeled with.
What is maximum current voltage and current ratings?
Whether a service is three phase or single phase this section of the NEC require service disconnect be in a readily accessible area marked and listed suitable for a disconnecting means
What is 230.70
NEC (abbreviation for)
What is the national electric code?
A force that produces or tends to produce rotation.
What is torque?
The rating that defines the capacity of a protective device to maintain its integrity
What is the interrupting rating?
This high leg on a four wire delta system must be durably and permanently marked in this color
What is orange?