NEC 2017, NFPA 70: NATIONAL ELECTRICAL CODE
What is the purpose of the Code?
Safeguarding of persons
Safeguarding of property
Instruction for trained personnel.
(2017 NEC: 90.1 (A))
What is the required protection for an electrical circuit running through a concrete slab?
Electrical...
Safeguarding of persons
Safeguarding of property
Instruction for trained personnel.
(2017 NEC: 90.1 (A))
What is the required protection for an electrical circuit running through a concrete slab?
Electrical circuits running through a concrete slab must be protected by using conduit or other methods
to prevent physical damage and comply with the NEC. ✔️✔️
What is the NEC rule for the installation of outdoor outlets on a balcony?
Outdoor outlets on a balcony must be weatherproof and GFCI protected to prevent electric shock in wet
conditions. ✔️✔️
What is the minimum size of a grounding electrode conductor for a 150-amp residential service?
The minimum size of the grounding electrode conductor for a 150-amp residential service is typically 8
AWG copper or 6 AWG aluminum. ✔️✔️
What is the rule for installing an electrical panel in a basement?
An electrical panel installed in a basement must be located in a dry, accessible area, with at least 36
inches of working space in front for safe operation and maintenance. ✔️✔️
What is required for an electrical system in a wet location like a pool area?
In a wet location, such as around a swimming pool, all electrical wiring and equipment must be GFCI
protected and suitable for wet conditions. ✔️✔️
What is the NEC requirement for bonding a metal gas line?
A metal gas line must be bonded to the electrical system’s ground to prevent the risk of electrical shock
or fire due to stray currents. ✔️✔️
,What is the rule for protecting an underground service lateral from damage?
An underground service lateral must be installed at a minimum depth of 24 inches and be protected
from physical damage with a covering like a conduit or warning tape. ✔️✔️
What is the NEC requirement for the installation of a smoke detector in a hallway?
A smoke detector must be installed in hallways outside of bedrooms and be interconnected with other
detectors to ensure that all alarms activate when smoke is detected. ✔️✔️
What is the minimum clearance for a service entrance cable above a flat roof?
The service entrance cable must have a minimum clearance of 3 feet above a flat roof to allow for safe
access and prevent potential damage. ✔️✔️
What is the NEC rule for the use of extension cords in construction sites?
Extension cords on construction sites must be rated for outdoor use, have GFCI protection, and be
inspected regularly for wear and damage to prevent electrical hazards. ✔️✔️
What is the requirement for outlet placement in a kitchen under the NEC?
Outlets must be installed within 24 inches of the edge of a countertop in a kitchen and must be GFCI
protected to ensure safety. ✔️✔️
What is the minimum size conductor for a 30-amp electric range circuit?
The minimum conductor size for a 30-amp electric range circuit is typically 10 AWG copper or 8 AWG
aluminum. ✔️✔️
How should electrical wiring be installed through a concrete floor?
Electrical wiring passing through a concrete floor must be installed in conduit or another protective
means to prevent damage and comply with the NEC’s safety requirements. ✔️✔️
What is the NEC requirement for bonding metal parts of a swimming pool?
,The metal parts of a swimming pool, including ladders and diving boards, must be bonded together to
prevent electric shock hazards caused by stray electrical currents. ✔️✔️
What is required for electrical outlets in a bathroom according to the NEC?
All electrical outlets in a bathroom must be GFCI protected to ensure safety in wet environments and to
protect against electrical shock hazards. ✔️✔️
What is the minimum size conductor for a 200-amp residential service?
The minimum conductor size for a 200-amp residential service is typically 4 AWG copper or 2 AWG
aluminum. ✔️✔️
What is the rule for the installation of wiring in a crawl space?
Wiring in a crawl space must be secured to prevent damage, and it must be protected from physical
hazards by using conduit or other methods where necessary. ✔️✔️
What is the minimum distance between a ground rod and any other electrical system grounding
electrode?
A ground rod must be installed at least 6 feet away from other grounding electrodes, such as a metal
water pipe, to ensure proper grounding. ✔️✔️
What is required when installing a generator to comply with the NEC?
A generator must be properly grounded and equipped with a disconnect switch to allow safe operation
and maintenance. The generator’s electrical system must also be bonded to the building’s grounding
system. ✔️✔️
What is the NEC requirement for grounding a metal building?
Metal buildings must be grounded to the electrical system’s ground to prevent potential electric shock
hazards, with grounding conductors sized according to the building’s service capacity. ✔️✔️
What is the rule for grounding a portable appliance like an electric dryer?
A portable appliance like an electric dryer must be properly grounded to prevent electrical shock, either
by using a grounded receptacle or by grounding the appliance through its power cord. ✔️✔️
, What is required when using aluminum wiring in residential installations?
Aluminum wiring must be properly sized, terminated, and connected with approved connectors to
ensure it does not overheat, corrode, or cause fire hazards. ✔️✔️
What is the minimum required height for an outdoor lighting fixture mounted on a post?
Outdoor lighting fixtures mounted on a post must be installed at a height of at least 8 feet to reduce the
risk of damage and to meet the clearance requirements in the NEC. ✔️✔️
What is the rule for installing electrical outlets in a garage?
Electrical outlets in garages must be installed at least 18 inches above the floor and must be GFCI
protected to reduce the risk of electric shock in damp environments. ✔️✔️
What is the NEC requirement for the placement of receptacles in a commercial office?
In a commercial office, receptacles must be installed in every work area to ensure sufficient access to
electrical power and must meet the accessibility standards outlined in the NEC. ✔️✔️
What is the rule for using flexible cords in residential installations?
Flexible cords in residential installations are allowed only for temporary applications and must not
replace permanent wiring methods unless specifically approved by the NEC. ✔️✔️
What is the rule for outlet placement in a hallway?
Outlets in a hallway must be installed no more than 12 feet apart to provide adequate power access
while complying with NEC guidelines. ✔️✔️
What is the required protection for outdoor outlets exposed to the elements?
Outdoor outlets exposed to the elements must be enclosed in weatherproof, GFCI-protected boxes to
protect against moisture and reduce electrical shock hazards. ✔️✔️
What is the minimum wire size for a 50-amp electric dryer circuit?
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller CertifiedGrades. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $9.19. You're not tied to anything after your purchase.
