(b) Where an existing system is to be extended and competitive
manufacturers cannot meet performance or dimensional requirements
(c) Where required by a public utility or municipal system as a
condition of its services, specifications shall state this condition
1.11 CALCULATIONS
The Engineer shall submit the following calculations to the VA: short
circuit calculations, protective device study, load calculations,
generator-set sizing calculations, voltage drop calculations, lighting
calculations and seismic bracing calculations. The VA reserves the
right to request additional calculations to suit the project.
(a) Short Circuit Calculations: Prepare calculations for all new
projects and renovations to existing electrical distribution systems.
(b) Protective Device Study: Prepare and submit to VA a short circuit
and coordination study to justify the selection of equipment for the
following types of projects:
(1) Large Hospital New Construction
(2) Major Primary Replacements or Modifications
(3) Other Projects, as specifically requested by the VA
(c) Load Calculations: Prepare calculations for all new projects and
renovations to existing Distribution Systems
(d) Generator Set Sizing Calculations: All applicable projects
(e) Lighting Calculations: All projects
(f) Seismic Bracing Calculations: All projects
(g) Voltage Drop Calculations: All projects: Maximum 3percent voltage
drop
1.12 SEISMIC BRACING
1.12.1 REFERENCES
Refer to H-18-8, "VA Seismic Design Requirements" and VA Design and
Construction Procedures, "Natural Disasters Non-Structural Resistive
Design" and Section 13081 "Seismic Restraint Requirements for Non-
Structural Component".
1.12.2 DRAWINGS
Contract drawings shall show the detail methods of fastening including
the size, number and type of anchors and fasteners to be used to secure
the equipment against the seismic forces.
1.12.3 EQUIPMENT BRACING
ELECTRICAL DESIGN MANUAL
1-9
GENERAL REQUIREMENTS
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