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Quality Program LessonElectrical/Generator/Transfer Switch

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At the end of this lesson you will understand the

requirements for electrical systems, generator installationsand the use of Transfer Switches for site protection. You will

achieve an understanding of transfer switch installations and

be able to recognize their proper installation and that they

are in accordance with manufacturer specs.

Objectives

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Electrical/Generator/Transfer Switch

Introduction

Electrical component installation

Electrical routing and termination

Generator, fuel tank and associated signage

Generator receptacle

Automatic transfer switch (ATS)

Lighting

DC power cables

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Electrical component installation Verify all interior & exterior electrical components

(conduit, outlets, switches, work boxes, breakers, pullboxes, junction boxes, and panels etc.) are properly

installed, anchored and grounded.

Verify that cables, lugs, etc. are correctly installed,

routed, supported, secured, protected, crimped, andlabeled.

Verify that clear heat shrink has been installed in

electrical cable lugs.

Verify that the DC breakers in shelter room are thecorrect size:

DC Fan 5A

DC Smoke 5A

DC Lights 10A

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Generator, fuel tank and associated signage

Verify the emergency generator, associated fuel tanksand signage have been installed where required by the

construction drawings and/or project specifications.

Fuel tank will have an AT&T designation label.

Generator pad free of cracks and defects. Fixed generator is properly grounded

Solid ground leads (min. 2) attached to generator with

the correct lug No-Ox is applied and paint removed at contact point.

Fixed generator doors and fuel filler cap/box locked, if

applicable.

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Generator receptacle

Verify site is equipped with AT&T Mobility standard

generator receptacle (cam-lock), if required. Verify cam-lock is grounded.

Automatic transfer switch (ATS)

ATS is required on sites with a fixed generator only.

May be contained in the Intersect PTLC (AC breaker panel)

or equivalent.

Verify ATS has been installed and is labeled per the

construction drawings and/or project specifications andtested.

Generator / ATS Testing & Commissioning

If in scope, verify that the generator and ATS have been

tested and commissioned.

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Lighting

Insure all lighting (indoor/outdoor) is

functional, including DC powered lights if

equipped. Insure the lighting in the equipment areas is

adequate and in good repair.

Verify emergency lamps are workingproperly.

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DC power cables

Verify that all DC power cables are the proper

type. Verify that all DC power cables are correctly

routed, supported, secured and protected.

Verify that all DC power cables are correctlycolor coded for voltage per specs.

Verify that all DC power cable lugs are the

correct type & size, are correctly installed and clear

heat shrink is used.

Verify that all indoor DC power cables enter /

exit cable ladder racks over the side (waterfall) and

not through ladder rungs.

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What do you see? Good? Not good?

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Electrical/Generator/Transfer Switch