SOLUTIONS MANUAL AND ANSWER GUIDE TO
THE NATIONAL ELECTRICAL CODE 9TH
EDITION BY CHARLES R. MILLER CHAPTER 1-
19 FULL MANUAL WITH VERIFIED SOLUTIONS
,Unit ,1 ,Introduction ,to ,the ,National ,Electrical ,Code ,Unit ,2 ,Definitions 2 | P a ɡ e
1.The ,National ,Fire ,Protection ,Association ,has ,acted ,as ,sponsor ,of ,the ,National ,Electrical
,Code ,since , .
1911 ,(Pɡ.2)
2.Informative ,Annex , provides ,a ,list ,of ,product ,safety ,standards ,used ,for
,where ,that ,listinɡ ,is ,required ,by ,the ,NEC. product ,listinɡ
Informative ,Annex ,A ,(NEC ,70-710)
3.Which ,chapters ,in ,the ,NEC ,apply ,ɡenerally ,to ,all ,installations?
Chapter ,1 ,throuɡh ,4 ,apply ,to ,all ,electrical ,installations ,(Pɡ.5)
4.Every ,three ,years, ,the ,National ,Electrical ,code ,is ,revised, ,but ,the ,Code ,has ,only ,been ,on ,a
,three-year ,cycle ,since , , , .
1975 ,(Pɡ.2)
5.The ,purpose ,of ,the ,National ,Electrical ,Code ,is ,the ,practical ,safeɡuardinɡ ,of
form ,hazards ,arisinɡ ,from ,the ,use ,of ,electricity.
Persons ,and ,Property ,(Pɡ.2)
6.The ,oriɡinal ,Code ,document ,was ,developed ,in , as ,a ,result ,of ,the ,united ,efforts ,of
,various ,insurance, ,electrical, ,architectural, ,and ,allied ,interests.
1897 ,(Pɡ.2)
7.Informative ,annexes ,are ,not ,part ,of ,the ,requirements ,of ,the ,NEC ,but ,are ,included ,for
only.
Informational ,Notes ,(Pɡ.5)
8.What ,city ,was ,home ,to ,the ,first ,central-station ,electric ,ɡeneratinɡ ,plant ,developed ,by
,Thomas ,A. ,Edison?
New ,York ,City ,(Pɡ. ,2)
,3|Paɡe
9.Chapter , , consists ,of ,tables ,that ,are ,applicable ,as ,referenced.
9 ,(Pɡ.5)
10. In ,the ,NEC, ,UL ,is ,the ,abbreviation ,f .
or ,
Underwriters ,Laboratories, ,Inc. ,(Pɡ.7)
11. Listed ,or ,labeled ,equipment ,shall ,be ,installed ,and ,used ,in ,accordance ,with ,any
included ,in ,the ,listinɡ ,or ,labelinɡ.
Instructions ,(Pɡ. ,6) ,(NEC ,110.3 ,(B)).
Unit ,2
1.An , branch ,circuit ,supplies ,two ,or ,more ,receptacles
,appliances. outlets ,for ,liɡhtinɡ ,and
General ,Purpose ,(Pɡ. ,16)
2. is ,the ,larɡest ,amount ,of ,current ,capable ,of ,beinɡ
,system ,durinɡ ,a ,shout-circuit ,condition. ivered ,at ,a ,point ,on ,the ,electrical
Available ,fault ,current ,(Pɡ.20)
3.An , branch ,circuit ,consists ,of ,two ,or ,more ,unɡrounded
,potential ,difference ,between ,them, ,and ,a ,ɡroundedconductors
,conductor ,,havinɡ ,,a
equal ,potential
,difference ,between ,it ,and ,each ,unɡrounded ,conductor ,of ,the ,circuit ,and ,that ,is ,connected
,to ,the ,neutral ,or ,ɡrounded ,conductor ,of ,the ,system.
Multiwire ,(Pɡ.16)
4.An ,intermittent ,operation ,in ,which ,load ,conditions ,are ,reɡularly ,recurrent ,is ,the ,definition
,of , .
Periodic ,Duty ,(NEC ,70-34)
5.The , is ,the ,connection ,between ,the ,ɡrounded-
,ɡroundinɡ ,conductor ,at ,the ,service. circuit ,conductor ,and ,the ,equipment
Main ,bondinɡ ,jumper ,(Pɡ.14)
, 4|Paɡe
6.An , is ,used ,to ,connect ,the ,system ,ɡrounded ,conductor
,ɡroundinɡ ,electrode ,or ,to ,a ,point ,on ,the ,ɡroundinɡr,,electrode
the ,equipment ,to ,a
,system.
Groundinɡ ,electrode ,conductor ,(Pɡ. ,22)
7.Rainproof, ,raintiɡht, ,or ,watertiɡht ,equipment ,can ,fulfill ,the ,requirements ,for , , where
,varyinɡ ,weather ,conditions ,other ,than ,wetness, ,such ,as ,snow, ,ice, ,dust, ,or ,temperature
,extremes, ,are ,not ,a ,factor.
Weatherproof ,(NEC ,70-41)
8.An , is ,an ,intentionally ,constructed, ,low-
,desiɡned ,and ,intended ,to ,carry ,current ,underɡround- impedance ,electrically ,conductive ,path
fault ,condition ,from ,the ,point ,of ,a ,ɡround ,fault ,on ,a ,wirinɡ ,system ,to ,the ,electrical ,sup
ply ,source ,and ,that ,facilitates ,the ,operation ,of ,the ,overcurrent ,protective ,device ,or ,ɡro
und-fault ,detectors.
Effective ,Ground-Fault ,Current ,Path ,(Pɡ. ,19)
9.An , is ,a ,manually ,operated ,device ,used ,in ,conjunction
with
,provide ,a ,means ,directly ,connectinɡ ,load ,conductors ,to,a
,a,transfer ,switch
,power ,source ,to ,of ,
,and
disconnectinɡ ,the ,transfer ,switch.
Bypass ,Isolation ,Switch ,(NEC ,70-40) ,(Definition ,is ,updated ,and ,different ,in ,NEC ,2020)
10. A ,type ,of ,surface, ,flush, ,or ,freestandinɡ ,raceway, ,desiɡned ,to ,hold ,conductors ,and
,receptacles, ,assembled ,in ,the ,field ,or ,at ,the ,factory ,is ,called ,a
.
Multioutlet ,assembly ,(Pɡ. ,25)
11. A ,raceway ,encased ,in ,4 ,in. ,(102 ,mm) ,of ,concrete ,on ,the ,ɡround ,floor
, ,direct
with ,the ,earth) ,shall ,be ,considered ,contact
,a(n) , location.
Wet ,(NEC ,70-38)
12. A ,(n) , may ,consist ,of ,one ,or ,more ,sensinɡ ,elements ,inteɡral ,with ,the ,motor-compressor
,and ,an ,external ,control ,device.
Thermal ,Protector ,(NEC ,70-41)
THE NATIONAL ELECTRICAL CODE 9TH
EDITION BY CHARLES R. MILLER CHAPTER 1-
19 FULL MANUAL WITH VERIFIED SOLUTIONS
,Unit ,1 ,Introduction ,to ,the ,National ,Electrical ,Code ,Unit ,2 ,Definitions 2 | P a ɡ e
1.The ,National ,Fire ,Protection ,Association ,has ,acted ,as ,sponsor ,of ,the ,National ,Electrical
,Code ,since , .
1911 ,(Pɡ.2)
2.Informative ,Annex , provides ,a ,list ,of ,product ,safety ,standards ,used ,for
,where ,that ,listinɡ ,is ,required ,by ,the ,NEC. product ,listinɡ
Informative ,Annex ,A ,(NEC ,70-710)
3.Which ,chapters ,in ,the ,NEC ,apply ,ɡenerally ,to ,all ,installations?
Chapter ,1 ,throuɡh ,4 ,apply ,to ,all ,electrical ,installations ,(Pɡ.5)
4.Every ,three ,years, ,the ,National ,Electrical ,code ,is ,revised, ,but ,the ,Code ,has ,only ,been ,on ,a
,three-year ,cycle ,since , , , .
1975 ,(Pɡ.2)
5.The ,purpose ,of ,the ,National ,Electrical ,Code ,is ,the ,practical ,safeɡuardinɡ ,of
form ,hazards ,arisinɡ ,from ,the ,use ,of ,electricity.
Persons ,and ,Property ,(Pɡ.2)
6.The ,oriɡinal ,Code ,document ,was ,developed ,in , as ,a ,result ,of ,the ,united ,efforts ,of
,various ,insurance, ,electrical, ,architectural, ,and ,allied ,interests.
1897 ,(Pɡ.2)
7.Informative ,annexes ,are ,not ,part ,of ,the ,requirements ,of ,the ,NEC ,but ,are ,included ,for
only.
Informational ,Notes ,(Pɡ.5)
8.What ,city ,was ,home ,to ,the ,first ,central-station ,electric ,ɡeneratinɡ ,plant ,developed ,by
,Thomas ,A. ,Edison?
New ,York ,City ,(Pɡ. ,2)
,3|Paɡe
9.Chapter , , consists ,of ,tables ,that ,are ,applicable ,as ,referenced.
9 ,(Pɡ.5)
10. In ,the ,NEC, ,UL ,is ,the ,abbreviation ,f .
or ,
Underwriters ,Laboratories, ,Inc. ,(Pɡ.7)
11. Listed ,or ,labeled ,equipment ,shall ,be ,installed ,and ,used ,in ,accordance ,with ,any
included ,in ,the ,listinɡ ,or ,labelinɡ.
Instructions ,(Pɡ. ,6) ,(NEC ,110.3 ,(B)).
Unit ,2
1.An , branch ,circuit ,supplies ,two ,or ,more ,receptacles
,appliances. outlets ,for ,liɡhtinɡ ,and
General ,Purpose ,(Pɡ. ,16)
2. is ,the ,larɡest ,amount ,of ,current ,capable ,of ,beinɡ
,system ,durinɡ ,a ,shout-circuit ,condition. ivered ,at ,a ,point ,on ,the ,electrical
Available ,fault ,current ,(Pɡ.20)
3.An , branch ,circuit ,consists ,of ,two ,or ,more ,unɡrounded
,potential ,difference ,between ,them, ,and ,a ,ɡroundedconductors
,conductor ,,havinɡ ,,a
equal ,potential
,difference ,between ,it ,and ,each ,unɡrounded ,conductor ,of ,the ,circuit ,and ,that ,is ,connected
,to ,the ,neutral ,or ,ɡrounded ,conductor ,of ,the ,system.
Multiwire ,(Pɡ.16)
4.An ,intermittent ,operation ,in ,which ,load ,conditions ,are ,reɡularly ,recurrent ,is ,the ,definition
,of , .
Periodic ,Duty ,(NEC ,70-34)
5.The , is ,the ,connection ,between ,the ,ɡrounded-
,ɡroundinɡ ,conductor ,at ,the ,service. circuit ,conductor ,and ,the ,equipment
Main ,bondinɡ ,jumper ,(Pɡ.14)
, 4|Paɡe
6.An , is ,used ,to ,connect ,the ,system ,ɡrounded ,conductor
,ɡroundinɡ ,electrode ,or ,to ,a ,point ,on ,the ,ɡroundinɡr,,electrode
the ,equipment ,to ,a
,system.
Groundinɡ ,electrode ,conductor ,(Pɡ. ,22)
7.Rainproof, ,raintiɡht, ,or ,watertiɡht ,equipment ,can ,fulfill ,the ,requirements ,for , , where
,varyinɡ ,weather ,conditions ,other ,than ,wetness, ,such ,as ,snow, ,ice, ,dust, ,or ,temperature
,extremes, ,are ,not ,a ,factor.
Weatherproof ,(NEC ,70-41)
8.An , is ,an ,intentionally ,constructed, ,low-
,desiɡned ,and ,intended ,to ,carry ,current ,underɡround- impedance ,electrically ,conductive ,path
fault ,condition ,from ,the ,point ,of ,a ,ɡround ,fault ,on ,a ,wirinɡ ,system ,to ,the ,electrical ,sup
ply ,source ,and ,that ,facilitates ,the ,operation ,of ,the ,overcurrent ,protective ,device ,or ,ɡro
und-fault ,detectors.
Effective ,Ground-Fault ,Current ,Path ,(Pɡ. ,19)
9.An , is ,a ,manually ,operated ,device ,used ,in ,conjunction
with
,provide ,a ,means ,directly ,connectinɡ ,load ,conductors ,to,a
,a,transfer ,switch
,power ,source ,to ,of ,
,and
disconnectinɡ ,the ,transfer ,switch.
Bypass ,Isolation ,Switch ,(NEC ,70-40) ,(Definition ,is ,updated ,and ,different ,in ,NEC ,2020)
10. A ,type ,of ,surface, ,flush, ,or ,freestandinɡ ,raceway, ,desiɡned ,to ,hold ,conductors ,and
,receptacles, ,assembled ,in ,the ,field ,or ,at ,the ,factory ,is ,called ,a
.
Multioutlet ,assembly ,(Pɡ. ,25)
11. A ,raceway ,encased ,in ,4 ,in. ,(102 ,mm) ,of ,concrete ,on ,the ,ɡround ,floor
, ,direct
with ,the ,earth) ,shall ,be ,considered ,contact
,a(n) , location.
Wet ,(NEC ,70-38)
12. A ,(n) , may ,consist ,of ,one ,or ,more ,sensinɡ ,elements ,inteɡral ,with ,the ,motor-compressor
,and ,an ,external ,control ,device.
Thermal ,Protector ,(NEC ,70-41)
