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NZQA registered unit standard 17056 version 2Page 1 of 6

Title Install explosion-protected electrical apparatus and wiring systems inhazardous areas

Level 4 Credits 9

Purpose This unit standard covers the explosion protection aspectsrelating to the installation of explosionprotected and associatedapparatus and !iring s"ste#s$ %t re&uires the a'ilit" to #atchapparatus !ith that specified for a given location( to !or) safel"in accordance !ith installation *tandards and to co#plete thenecessar" installation docu#entation$

This unit standard is for people !ho are authorised '" +lectrical,or)ers -egistration .oard /+,-. to carr" out installations of

electrical apparatus and are responsi'le for installing explosionprotected apparatus in haardous areas$

People credited !ith this unit standard are a'le to

prepare for installation of explosionprotected apparatus and

!iring3

install the apparatus and !iring s"ste#s3 and

confir# co#pletion of the installation$

Classification +xplosive At#ospheres 4 +lectrical Apparatus in +xplosiveAt#ospheres perations

vaila!le grade Achieved

"ntry information

Critical health and

safety prere#uisites

nit 1705(Attend to breakdowns in explosive atmospheres(or

de#onstrate e&uivalent )no!ledge and s)ills$

"xplanatory notes

1 This unit standard has 'een designed for training and assess#ent on8o' or off8o' ina si#ulated environ#ent !hich includes explosionprotected apparatus and !irings"ste#s si#ilar to those encountered in a real !or)place$

2 9andidates !ho achieve this unit standard !ill 'e given industr" endorse#ent forexplosionprotection techni&ues relating to one or #ore of #ining( gases( or dusts(

depending on !hich explosionprotection techni&ue co#petence is de#onstrated$The explosionprotection endorse#ents are as follo!s

+lectroTechnolog" %ndustr" Training rganisation**. 9ode 100:01

Ne! Zealand Qualifications Authorit" 201:

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NZQA registered unit standard 17056 version 2Page 2 of 6

$nit endorsement suffix Competence demonstrated+x ;d< =la#eproof +x ;e< %ncreased safet"+x ;n< Nonspar)ing+x ;i< %ntrinsic safet"+x ;p< Pressuriation

+x ;t>< />%P Protection '" enclosure ? dusts;%< @roup % apparatus onl";@ases< @as haards onl";>usts< >ust haards onl";+B< =or apparatus and s"ste#s operating at extralo!

voltage$=or further detail a'out the explosionprotection endorse#ents( please contact+T%T at httpCC!!!$etito$co$n$

D This unit standard is directl" e&uivalent to nit 2$5 Install explosion-protectedequipment and wiring systems in hazardous areasin the AustralianCNe! Zealand*tandard A*CNZ* :761$1200ECompetencies for working with electrical equipmentin hazardous areas (!A" #art $% Competency &tandardsand includes essentials)ills and )no!ledge as specified in the relevant clauses$ %t aligns !ith Australian9o#petenc" *tandards ')*+,A')*+.A ')*+/A and')*+0Afro# ++07 +lectrotechnolog" Training Pac)age Bersion D$1/cop"right Australian National Training %nfor#ation *ervice$

: This unit standard is intended to 'e assessed against in con8unction !ith other !or)s)ills related to the installation of electrical( electronic( instru#entation andCor dataco##unication apparatus and !iring s"ste#s at NZQ= evel : or a'ove$

5 9o#petence is to 'e de#onstrated in relation to an" classified haardous areas andexplosionprotection techni&ues$ ,here co#petenc" is de#onstrated on!iringCca'ling and apparatus that operate at extra lo! voltage and lo! voltage(registration !ith the +lectrical ,or)ers -egistration .oard /+,-. as a'le to installelectrical apparatus is re&uired$ =or !or) on !iring and apparatus operating a'ove1000 B a$c$ or 1500 B d$c$( co#petenc" in high voltage !or) #ust 'e held$ A cop" ofa candidate

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NZQA registered unit standard 17056 version 2Page D of 6

A*CNZ* 612:1$02005( lectrical apparatus for use in the presence of combustibledust 6 7eneral requirements3A*CNZ* 612:1$1:2005( lectrical apparatus for use in the presence of combustibledust 6 &election and installation3A*CNZ* 612:1$2$12000 lectrical apparatus for use in the presence of combustibledust 6 8est methods 6 )ethods for determining the minimum ignition temperature of

dust3+lectricit" Act 123+lectricit" /*afet" -egulations 20103Faardous *u'stances and Ne! rganis#s Act 163Fealth and *afet" in +#plo"#ent Act 12( and associated regulations3ew 3ealand lectrical Codes of #ractice (3C#"( %**N 011:066D /availa'le fro#the Ginistr" of +cono#ic >evelop#ent34orkplace xposure &tandards and 9iological xposure Indices( availa'le fro# the>epart#ent of a'our( httpCC!!!$osh$govt$nCorderCcatalogueCD2$sht#l( andassociated regulations3*tandards Australia F.1D2007( lectrical equipment for hazardous areas3and all su'se&uent a#end#ents and replace#ents$

7 >efinitionsAppropriate personnel? individuals !ith responsi'ilities for coordination( design(installation( #aintenance( production( or servicing activities$ This can include site#anagers( pro8ect #anagers( engineers and technicians( technical experts( line#anagers or supervisors( regulator" personnel( tea# leaders( other personneldesignated '" an organisation or enterprise$Certificationdocumentationdocu#ent/s that assure/s the confor#it" of a product(process( s"ste#( person( or organisation !ith specified re&uire#ents$

:esign documents? docu#ents specif"ing the design of apparatus( installations(s"ste#s( and plant$xplosion-protection techniques? techni&ues applied to the design of electricalapparatus( co#ponents and s"ste#s to prevent the electrical energ" fro# 'eco#ingan ignition source in the presence of fla##a'le vapours and gases or co#'usti'ledusts in explosive at#ospheres$ *ee xplosion-protected apparatus$xplosion-protected apparatus? electrical apparatus to !hich specific #easures areapplied to avoid ignition of a surrounding explosive at#osphere$ *uch apparatuse#plo"s one or #ore of the follo!ing explosionprotection techni&ues=or gas and vapour at#ospheres

+x d ? fla#eproof3

+x e ? increased safet"3+x i ? intrinsic safet"3 !ith levels of protection +x ia( +x i' and +x ic3+x n ? nonspar)ing3

=or dusts+x i> ? intrinsic safet" /dusts3+x t> ? enclosed3

thers( less co##on+x p ? pressurisation3 +x p> /dust3+x # ? encapsulation( !ith levels of protection +x #a( +x #'( +x #c /gases andvapours( and +x #> /dusts3+x s ? special protection3 categorised '" Zone of application3 e$g$ ;+x s

/Zone 03+x o ? oil i##ersion3+x & ? sand filled3

+lectroTechnolog" %ndustr" Training rganisation**. 9ode 100:01

Ne! Zealand Qualifications Authorit" 201:

http://www.osh.govt.nz/order/catalogue/329.shtmlhttp://www.osh.govt.nz/order/catalogue/329.shtml

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NZQA registered unit standard 17056 version 2Page : of 6

+x v ? ventilation$xplosive atmosphere? #ixture !ith air( under at#ospheric conditions( of fla##a'lesu'stances in the for# of gas( vapour( dust( fi'res( or fl"ings( !hich( after ignition(per#its selfsustaining propagation$!azardous area? area in !hich an explosive at#osphere is present( or #a" 'eexpected to 'e present( in &uantities such as to re&uire special precautions for the

construction( installation and use of electrical apparatus$5equirements 6 those to !hich apparatus( procedures and their outco#es have toconfor# and include statutor" o'ligations and regulations and *tandards called up '"legislation or regulations$;erification dossier? a set of docu#ents sho!ing the co#plete co#pliance histor" ofelectrical apparatus and installations !ithin haardous areas( as defined in*tandards$4iring system? per#itted !iring and accessories for po!er( #easure#ent( controlor co##unications purposes$

E -angea Assess#ent is to ta)e account of variations 'et!een the industr" sectors and

enterprises$ =or exa#ple( apparatus used in underground coal #ining !ill 'edifferent in so#e respects fro# that used in a petroche#ical plant$

' ccupational *afet" and Fealth /*F policies and procedures #a" include 'utare not li#ited to ? !or) per#its and clearances( haard #onitoring( evacuationprocedures( plant and electrical isolation$

c The application of contingenc" #anage#ent s)ills #ust 'e de#onstrated for alloutco#es and evidence re&uire#ents$

d +sta'lished #aintenance procedures #ust 'e follo!ed$e All activities and evidence presented for all outco#es and evidence re&uire#ents

in this unit standard #ust 'e in accordance !ith safe !or)ing principles andpractices( legislation( policies( procedures( ethical codes and *tandards( safe andsound practice( and industr" practice3 and( !here appropriate( #anufacturers