Amtech & Manual Cable Sizing Calculation

Only available on StudyMode
  • Topic: Volt, Voltage, Power cable
  • Pages : 19 (782 words )
  • Download(s) : 171
  • Published : November 6, 2012
Open Document
Text Preview
 

  Index
 
 

Declaration ................................................................... Error! Bookmark not defined.   Index .............................................................................................................................. 1   Cable

 Sizing ................................................................................................................... 2   Objective ................................................................................................................... 2   Procedure .................................................................................................................. 2   Design

 Current
 (Ib) .............................................................................................. 2   Current
 Carrying
 Capacity
 of
 the
 cable
 (Iz): ...................................................... 3   Correct
 Cable
 Size: ................................................................................................ 3   Volt
 drop
 (Vd): ...................................................................................................... 4   Result ......................................................................................................................... 5   Conclusion ................................................................................................................. 5   Amtech

 PDF .................................................................................................................. 6  

 

 


 

Cable
 Sizing
 

Objective
 
  The
 objective
 of
 the
 assignment
 is
 to
 pick
 the
 correct
 size
 of
 cable
 and
 the
 correct
  protective
 conductor
 and
 also
 the
 correct
 protective
 device
 for
 the
 following
  installation:
 
  A
 consumer
 has
 asked
 to
 have
 installed,
 a
 new
 9kw/230v
 cooker
 unit
 in
  domestic
 premises.
 The
 existing
 eight
 way
 consumer
 unit
 houses
 ISN
 EN60898
  MCBs/ISN
 EN
 61009
 RCBOs
 and
 supplies
 two
 final
 ring
 circuits,
 one
 shower
  circuit,
 one
 immersion
 heater
 circuit
 and
 two
 lighting
 circuits
 leaving
 two
 spare
  ways.
  The
 length
 of
 run
 from
 the
 consumer
 unit
 to
 the
 cooker
 is
 approximately
 28m.
  The
 installation
 reference
 method
 is
 method
 C,
 the
 ambient
 temperature
 will
 not
  exceed
 30̊
 C
 and
 the
 circuit
 is
 grouped
 with
 3
 other
 circuits.
 
 

 
Procedure
 
 
 
  Design
 Current
 (Ib)
  This
 can
 be
 obtained
 by
 the
 following
 formula:
 
 

������������ =

 

������ 9000 = = 39.13������
  ������ 230  ×  1

������������ = 39.13
 
 

  The
 protective
 device
 (In)
 that
 is
 to
 be
 used
 in
 this
 installation
 is:
  1
 x
 ISN
 EN60898
 40A
 MCB
 
 
 

 

Current
 Carrying
 Capacity
 of
 the
 cable
 (Iz):
 
 
  The
 current
 carrying
 capacity
 of
 the
 cable
 is
 known
 as
 Iz
 this
 can
 be
  obtained
 by
 the
 following
 formula:
 
 

������������ =

 

������������
  ������������×������������

Ca
 is
 the
 ambient
 temperature
 factor.
 This
 can
 be
 obtained
 in
 Table
 A52-­‐ G1
 Pg-­‐283
 of
 the
 ETCI
 Rules.
 The
 factor
 for
 this
 installation
 is
 Ca
 =
 1
 as
 the
  temperature
 does...
tracking img