Specifications

PIP ELCGL01
November 2002 Electrical Design Criteria
Process Industry Practices Page 11 of 20
5.5.2 Medium-voltage switchgear shall be metal-clad drawout type as specified in
PIP ELSSG02 unless specified otherwise on the Data Sheet.
5.5.3 Switchgear-tripping voltages shall be 125-volt battery-supported DC unless
specified otherwise on the Data Sheet.
5.6 Switchgear and Substation Batteries
Switchgear and substation batteries shall be lead-acid flooded-cell type as specified
in PIP ELSAP11 unless otherwise specified on the Data Sheet.
5.7 Switchgear Buildings and Enclosures
Switchgear shall be housed in prefabricated buildings such as those specified in
PIP ELSSG11 or in outdoor enclosures such as those specified in PIP ELSSG12 or in
built-in-place buildings as specified on the Data Sheet.
6. Motors
6.1 AC motors shall be specified in accordance with the appropriate PIP specification
and with the horsepower requirements and system supply voltages specified on the
Data Sheet entry identified in Section 3.5 of this Practice. Refer to PIP ELSMT01,
PIP ELSMT02, PIP ELSMT03, and PIP ELSMT04.
6.2 Motors shall be installed as specified in PIP ELIMT000, PIP ELIMTN00,
PIP ELIMS00, and PIP ELIMTT00 installation details unless specified otherwise on
the Data Sheet.
7. Motor Control
7.1 Single-Phase Motor Control
Controllers for single-phase motors should be manual motor starters with overload
protection, located near the motors. Manual starters shall be used only if the motor
can restart automatically after a power failure without creating a safety problem.
Short-circuit protection shall be in accordance with the NEC. Local magnetic starters
may be provided if required for the application.
7.2 480-Volt Motor Control
7.2.1 MCCs shall be specified per PIP ELSMC12, PIP ELSMC13, or other, as
indicated on the Data Sheet.
7.2.2 MCCs shall be centrally located where possible and practical. They shall not
be located in classified areas, nor where they may be exposed to corrosive
chemicals, dust, or water, nor where they would be subject to damage by
moving equipment. The preferred location is within an environmentally
controlled, separate electrical equipment room. MCCs located indoors shall
be NEMA 1 gasketed unless specified otherwise on the Data Sheet.