Quantcast Electrical Power Requirements

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the truck inspection station shall have cargo handling equipment and storage areas to provide
temporary storage of material removed from suspect vehicles. The size of this area will be
based on the anticipated demand.
7.5 Electrical Power Requirements
Electrical design shall consider current power demands as well as the power requirements for
future traffic control devices, identification equipment, and other devices associated with
potential automation of the truck inspection station. This includes an allowance for the power
demands of future vehicle inspection equipment, such as fixed large vehicle x-ray devices.
See Section 7.2 for additional information concerning vehicle inspection equipment.
OPNAV 5530.14C specifies emergency power for protective lighting provided for restricted
areas. TM5-811-1 specifies an alternate electrical power requirement for security lighting.
Similarly, each truck inspection station shall have provisions of an alternate electrical power
requirement. In the event of a loss of the primary electrical source, a reliable alternate power
source is necessary to ensure continuous operation of the ECP. A standby generator will be
used as the alternate electrical power source. Either automatic or manual starting of the
generator and load transfer will be provided depending on the permissible electric power
outage duration (5). In some cases, installations may specify the use of portable generators in
addition to stationary auxiliary electric power sources. Provision of portable units is not the
designer's responsibility, beyond providing a connection point when directed.
Due to operational considerations, it may be necessary to provide an uninterruptible power
supply (UPS) for use during generator starting and load transfer. The UPS system would
support any computerized equipment to avoid power disruption. In accordance with TM5-
811-1, UPS will not normally be used for security lighting. A UPS system designed for
computer loads will not perform satisfactorily for lighting applications. If the installation
requires the use of UPS, the design should clearly identify the nonlinear nature and switching
patterns of the load to be served (5, 11-5).
The sites for a truck inspection station may commonly be congested and limited in size.
Therefore, transformers should be provided with less flammable insulating fluid in order to
facilitate the placement of the transformer closer to structures.
7.6 Exterior Lighting
References 2,5, and 6 discuss exterior lighting for general security purposes. The parking and
roadway areas of the truck inspection station should have a minimum illumination of 10 lux (1
footcandle). The areas where the actual inspections take place should be illuminated to a
minimum of 100 lux (10 footcandles).
It may also be necessary to provide additional task lighting in the ID and inspection areas to
support adequate identification of vehicle occupants and contents. Lighting may also be
mounted at or below pavement level to facilitate under vehicle inspection or associated with
under vehicle inspection systems (see Section 7.2) (8, 29-20).
As discussed in the IESNA Lighting Handbook, the light source spectral power distribution is
important for identification and inspection tasks such as seeing hair, eye, clothing, complexion,
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