Siemens TIASTAR SFIM-70020, Manual

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G2 Siemens Energy & Automation, Inc. 1000 McKee Street Batavia, Illinois 60510
SFIM-7002A-0901
Section G, September, 2001
Field Terminations: NEMA Classes and Types
Class I – Independent Units
Class I motor control centers shall consist of mechanical
groupings of combination motor control units, feeder tap
units, other units, and electrical devices arranged in a conve-
nient assembly. The manufacturer shall furnish drawings that
include;
(a) Overall dimensions of the motor control center, identifica-
tion of units and their location in the motor control center,
locations of incoming line terminals, mounting dimen-
sions, available conduit entrance areas, and the location of
the master terminal board if required (Type C wiring only).
(b) Manufacturer’s standard diagrams for individual units and
master terminal boards (Type C wiring only), consist of a
drawing(s) that:
1. Identifies electrical devices.
2. Indicates electrical connections.
3. Indicates terminal numbering designations.
Note:
When a combination schematic and/or wiring diagram for a
unit(s) is supplied showing optional devices, the manufactur-
er shall provide information to indicate which devices are actu-
ally furnished.
Class II – Interconnected Units
Class II motor control centers shall be the same as Class I
motor control centers with the addition of manufacturer fur-
nished electrical interlocking and wiring between units as
specifically described in overall control system diagrams sup-
plied by the purchaser.
In addition to the drawings furnished for Class I motor control
centers, the manufacturer shall furnish drawings that indicate
factory interconnections within the motor control center.
Field terminations: NEMA classes and types
Class I Class II
Description Types Types
A Bd Bt C Bd Bt C
TERMINALS REQUIRED
For all control connections – X X X X X X
For starter load connections Sizes 1 through 3
a
– – X X – X X
TERMINALS MOUNTED
On control unit – X X X X X X
In master terminal compartment
s
– – – X – – X
INTERWIRING
Between units in the same motor control center – – – – X X X
DIAGRAM
Connection for each starter or control unit X X X X X X X
Elementary and interconnection of complete – – – – – – –
motor control center – – – – X X X
OTHER DRAWINGS
Overall dimensions of motor control center X X X X X X X
Location of terminals in master terminal compartment – – – X – – X
d
a
No load terminals furnished for starters, Sizes 3½ through 6, main or branch circuit breaker or fusible switches,
distribution transformers or lighting panelboards.
s
Located at top or bottom of each section and wired to the various units.
d
Included on motor control center interconnection diagram.