Transcript Facilities Management and Design

Facilities Management and Design
Chapter 6
Electrical Systems
Basic Electrical Terms
 Voltage
 Amperes
 Wattage
 Resistance
 Frequency
 Phases
Codes and Standards




Wire size and type
Circuit loading
Capacity
Wiring conventions
Codes

National Electrical Code (NEC)
–

safety, minimum standards
OSHA safety standards
–
–
–
–
For electrical systems
safety-related work practices
maintenance requirements
special equipment
Elements of an effective electrical system
and equipment maintenance program





Current electrical system plans
Working knowledge of electrical practices
and building's electrical system
Good housekeeping practices in electrical
equipment areas
Knowledge and adherence to property safety
procedures
Incorporation of electrical maintenance
procedures into building's PM program
Electrical system components








Fuses and circuit breakers (esp. GFCI)
Distribution panels and wiring
Electric motors
Controls systems
Drive elements
Electronic equipment
Emergency power systems
Electrical maintenance equipment
Electric utility billing




Energy or consumption charge - kilowatt
hours, kWh
Demand or capacity charge - business's
highest rate of energy usage, kW
Ratchet clauses
Read meters
–
–
Daily or per shift for problem diagnosis
Monthly to check on utility company readings
Electric utility billing (Cont.)
Kilowatt-hour or Usage meter

0
1
0
9
9
8
2
7
3
6
4
5
(like an odometer)
0
1
1
2
8
3
7
4
6
5
0
9
9
8
2
7
3
6
4
5
1
2
8
3
7
4
6
5
Electric utility billing (Cont.)

Kilowatt or Demand meter
0
1
2
3
4
5
6
Electric utility billing (Cont.)
Rates vary by
 season
 time of day
Review Tariff options
 major changes in operations
 rate changes
 before and after implementing energy
conservation programs
Utility deregulation






choose an electric utility
electric rates are more volatile
following market ups and downs
more power outages
power-reliability problems
potential for savings