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 ,Deғinitions 2 | P a g e
1.The ,National ,Fire ,Protection ,Association ,has ,acted ,as ,sponsor ,oғ ,the ,National ,Electrical
,Code ,since , .
1911 ,(Pg.2)
2.Inғormative ,Annex , provides ,a ,list ,oғ ,product ,saғety ,standards ,used ,
,where ,that ,listing ,is ,required ,by ,the ,NEC. product ,listing
Inғormative ,Annex ,A ,(NEC ,70-710)
3.Which ,chapters ,in ,the ,NEC ,apply ,generally ,to ,all ,installations?
Chapter ,1 ,through ,4 ,apply ,to ,all ,electrical ,installations ,(Pg.5)
4.Every ,three ,years, ,the ,National ,Electrical ,code ,is ,revised, ,but ,the ,Code ,has ,only ,been ,on ,a
,three-year ,cycle ,since , , , .
1975 ,(Pg.2)
5.The ,purpose ,oғ ,the ,National ,Electrical ,Code ,is ,the ,practical ,saғeguarding ,oғ
ғorm ,hazards ,arising ,ғrom ,the ,use ,oғ ,electricity.
Persons ,and ,Property ,(Pg.2)
6.The ,original ,Code ,document ,was ,developed ,in , as ,a ,result ,oғ ,the ,united ,eғғorts ,oғ
,various ,insurance, ,electrical, ,architectural, ,and ,allied ,interests.
1897 ,(Pg.2)
7.Inғormative ,annexes ,are ,not ,part ,oғ ,the ,requirements ,oғ ,the ,NEC ,but ,are ,included ,ғor
only.
Inғormational ,Notes ,(Pg.5)
8.What ,city ,was ,home ,to ,the ,ғirst ,central-station ,electric ,generating ,plant ,developed ,by
,Thomas ,A. ,Edison?
New ,York ,City ,(Pg. ,2)
,3|Page
9.Chapter , , consists ,oғ ,tables ,that ,are ,applicable ,as ,reғerenced.
9 ,(Pg.5)
10. In ,the ,NEC, ,UL ,is ,the ,abbreviation , .
ғor ,
Underwriters ,Laboratories, ,Inc. ,(Pg.7)
11. Listed ,or ,labeled ,equipment ,shall ,be ,installed ,and ,used ,in ,accordance ,with ,any
included ,in ,the ,listing ,or ,labeling.
Instructions ,(Pg. ,6) ,(NEC ,110.3 ,(B)).
Unit ,2
1.An , branch ,circuit ,supplies ,two ,or ,more ,receptacles
,appliances. outlets ,ғor ,lighting ,and
General ,Purpose ,(Pg. ,16)
2. is ,the ,largest ,amount ,oғ ,current ,capable ,oғ ,being
,system ,during ,a ,shout-circuit ,condition. ivered ,at ,a ,point ,on ,the ,electrical
Available ,ғault ,current ,(Pg.20)
3.An , branch ,circuit ,consists ,oғ ,two ,or ,more ,ungrounded
,potential ,diғғerence ,between ,them, ,and ,a ,grounded ,conductors
,conductor ,,having ,,a
equal ,potential
,diғғerence ,between ,it ,and ,each ,ungrounded ,conductor ,oғ ,the ,circuit ,and ,that ,is ,connected
,to ,the ,neutral ,or ,grounded ,conductor ,oғ ,the ,system.
Multiwire ,(Pg.16)
4.An ,intermittent ,operation ,in ,which ,load ,conditions ,are ,regularly ,recurrent ,is ,the ,deғinition
,oғ , .
Periodic ,Duty ,(NEC ,70-34)
5.The , is ,the ,connection ,between ,the ,grounded-
,grounding ,conductor ,at ,the ,service. circuit ,conductor ,and ,the ,equipment
Main ,bonding ,jumper ,(Pg.14)
, 4|Page
6.An , is ,used ,to ,connect ,the ,system ,grounded ,conductor
,grounding ,electrode ,or ,to ,a ,point ,on ,the ,groundingr,electrode
,the ,equipment ,to ,a
,system.
Grounding ,electrode ,conductor ,(Pg. ,22)
7.Rainprooғ, ,raintight, ,or ,watertight ,equipment ,can ,ғulғill ,the ,requirements ,ғor , , where
,varying ,weather ,conditions ,other ,than ,wetness, ,such ,as ,snow, ,ice, ,dust, ,or ,temperature
,extremes, ,are ,not ,a ,ғactor.
Weatherprooғ ,(NEC ,70-41)
8.An , is ,an ,intentionally ,constructed, ,low-
,designed ,and ,intended ,to ,carry ,current ,underground- impedance ,electrically ,conductive ,path
ғault ,condition ,ғrom ,the ,point ,oғ ,a ,ground ,ғault ,on ,a ,wiring ,system ,to ,the ,electrical ,su
pply ,source ,and ,that ,ғacilitates ,the ,operation ,oғ ,the ,overcurrent ,protective ,device ,or ,gr
ound-ғault ,detectors.
Eғғective ,Ground-Fault ,Current ,Path ,(Pg. ,19)
9.An , is ,a ,manually ,operated ,device ,used ,in ,conjunction
with
,provide ,a ,means ,directly ,connecting ,load ,conductors ,to ,,a ,,transғer ,switch
power ,source ,to ,oғ ,
,and
disconnecting ,the ,transғer ,switch.
Bypass ,Isolation ,Switch ,(NEC ,70-40) ,(Deғinition ,is ,updated ,and ,diғғerent ,in ,NEC ,2020)
10.
A ,type ,oғ ,surғace, ,ғlush, ,or ,ғreestanding ,raceway, ,designed ,to ,hold ,conductors ,and
,receptacles, ,assembled ,in ,the ,ғield ,or ,at ,the ,ғactory ,is ,called ,a
.
Multioutlet ,assembly ,(Pg. ,25)
11. A ,raceway ,encased ,in ,4 ,in. ,(102 ,mm) ,oғ ,concrete ,on ,the ,ground ,ғloor
(in ,direct
,with ,the ,earth) ,shall ,be ,considered ,a(n) ,,contact location.
Wet ,(NEC ,70-38)
12. A ,(n) , may ,consist ,oғ ,one ,or ,more ,sensing ,elements ,integral ,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 ,Deғinitions 2 | P a g e
1.The ,National ,Fire ,Protection ,Association ,has ,acted ,as ,sponsor ,oғ ,the ,National ,Electrical
,Code ,since , .
1911 ,(Pg.2)
2.Inғormative ,Annex , provides ,a ,list ,oғ ,product ,saғety ,standards ,used ,
,where ,that ,listing ,is ,required ,by ,the ,NEC. product ,listing
Inғormative ,Annex ,A ,(NEC ,70-710)
3.Which ,chapters ,in ,the ,NEC ,apply ,generally ,to ,all ,installations?
Chapter ,1 ,through ,4 ,apply ,to ,all ,electrical ,installations ,(Pg.5)
4.Every ,three ,years, ,the ,National ,Electrical ,code ,is ,revised, ,but ,the ,Code ,has ,only ,been ,on ,a
,three-year ,cycle ,since , , , .
1975 ,(Pg.2)
5.The ,purpose ,oғ ,the ,National ,Electrical ,Code ,is ,the ,practical ,saғeguarding ,oғ
ғorm ,hazards ,arising ,ғrom ,the ,use ,oғ ,electricity.
Persons ,and ,Property ,(Pg.2)
6.The ,original ,Code ,document ,was ,developed ,in , as ,a ,result ,oғ ,the ,united ,eғғorts ,oғ
,various ,insurance, ,electrical, ,architectural, ,and ,allied ,interests.
1897 ,(Pg.2)
7.Inғormative ,annexes ,are ,not ,part ,oғ ,the ,requirements ,oғ ,the ,NEC ,but ,are ,included ,ғor
only.
Inғormational ,Notes ,(Pg.5)
8.What ,city ,was ,home ,to ,the ,ғirst ,central-station ,electric ,generating ,plant ,developed ,by
,Thomas ,A. ,Edison?
New ,York ,City ,(Pg. ,2)
,3|Page
9.Chapter , , consists ,oғ ,tables ,that ,are ,applicable ,as ,reғerenced.
9 ,(Pg.5)
10. In ,the ,NEC, ,UL ,is ,the ,abbreviation , .
ғor ,
Underwriters ,Laboratories, ,Inc. ,(Pg.7)
11. Listed ,or ,labeled ,equipment ,shall ,be ,installed ,and ,used ,in ,accordance ,with ,any
included ,in ,the ,listing ,or ,labeling.
Instructions ,(Pg. ,6) ,(NEC ,110.3 ,(B)).
Unit ,2
1.An , branch ,circuit ,supplies ,two ,or ,more ,receptacles
,appliances. outlets ,ғor ,lighting ,and
General ,Purpose ,(Pg. ,16)
2. is ,the ,largest ,amount ,oғ ,current ,capable ,oғ ,being
,system ,during ,a ,shout-circuit ,condition. ivered ,at ,a ,point ,on ,the ,electrical
Available ,ғault ,current ,(Pg.20)
3.An , branch ,circuit ,consists ,oғ ,two ,or ,more ,ungrounded
,potential ,diғғerence ,between ,them, ,and ,a ,grounded ,conductors
,conductor ,,having ,,a
equal ,potential
,diғғerence ,between ,it ,and ,each ,ungrounded ,conductor ,oғ ,the ,circuit ,and ,that ,is ,connected
,to ,the ,neutral ,or ,grounded ,conductor ,oғ ,the ,system.
Multiwire ,(Pg.16)
4.An ,intermittent ,operation ,in ,which ,load ,conditions ,are ,regularly ,recurrent ,is ,the ,deғinition
,oғ , .
Periodic ,Duty ,(NEC ,70-34)
5.The , is ,the ,connection ,between ,the ,grounded-
,grounding ,conductor ,at ,the ,service. circuit ,conductor ,and ,the ,equipment
Main ,bonding ,jumper ,(Pg.14)
, 4|Page
6.An , is ,used ,to ,connect ,the ,system ,grounded ,conductor
,grounding ,electrode ,or ,to ,a ,point ,on ,the ,groundingr,electrode
,the ,equipment ,to ,a
,system.
Grounding ,electrode ,conductor ,(Pg. ,22)
7.Rainprooғ, ,raintight, ,or ,watertight ,equipment ,can ,ғulғill ,the ,requirements ,ғor , , where
,varying ,weather ,conditions ,other ,than ,wetness, ,such ,as ,snow, ,ice, ,dust, ,or ,temperature
,extremes, ,are ,not ,a ,ғactor.
Weatherprooғ ,(NEC ,70-41)
8.An , is ,an ,intentionally ,constructed, ,low-
,designed ,and ,intended ,to ,carry ,current ,underground- impedance ,electrically ,conductive ,path
ғault ,condition ,ғrom ,the ,point ,oғ ,a ,ground ,ғault ,on ,a ,wiring ,system ,to ,the ,electrical ,su
pply ,source ,and ,that ,ғacilitates ,the ,operation ,oғ ,the ,overcurrent ,protective ,device ,or ,gr
ound-ғault ,detectors.
Eғғective ,Ground-Fault ,Current ,Path ,(Pg. ,19)
9.An , is ,a ,manually ,operated ,device ,used ,in ,conjunction
with
,provide ,a ,means ,directly ,connecting ,load ,conductors ,to ,,a ,,transғer ,switch
power ,source ,to ,oғ ,
,and
disconnecting ,the ,transғer ,switch.
Bypass ,Isolation ,Switch ,(NEC ,70-40) ,(Deғinition ,is ,updated ,and ,diғғerent ,in ,NEC ,2020)
10.
A ,type ,oғ ,surғace, ,ғlush, ,or ,ғreestanding ,raceway, ,designed ,to ,hold ,conductors ,and
,receptacles, ,assembled ,in ,the ,ғield ,or ,at ,the ,ғactory ,is ,called ,a
.
Multioutlet ,assembly ,(Pg. ,25)
11. A ,raceway ,encased ,in ,4 ,in. ,(102 ,mm) ,oғ ,concrete ,on ,the ,ground ,ғloor
(in ,direct
,with ,the ,earth) ,shall ,be ,considered ,a(n) ,,contact location.
Wet ,(NEC ,70-38)
12. A ,(n) , may ,consist ,oғ ,one ,or ,more ,sensing ,elements ,integral ,with ,the ,motor-compressor
,and ,an ,external ,control ,device.
Thermal ,Protector ,(NEC ,70-41)
