MA Electric Code Challenges for Architects Boston Society of Architects Codes Committee March 19, 2013 Presented by Doug Anderson 313 Congress Street Boston, MA 02210 617.330.9390 617.330.9383 fax www.c3boston.com
Best Practice Commercial Construction Consulting is a Registered Provider with The American Institute of Architects Continuing Education Systems. Credit earned on completion of this program will be reported to CES Records for AIA members. Certificates of Completion for non-aia members are available upon request. This program is registered with the AIA/CES for continuing professional education. As such, it does not include content that may be deemed or construed to be an approval or endorsement by the AIA of any material of construction or any method or manner of handling, using, distributing, or dealing in any material or product. Questions related to specific materials, methods, and services will be addressed at the conclusion of this presentation.
SL1 Learning Objectives Basics of electrical engineering Scope of the NEC and review of the MA Amendments Differences between emergency and standby power Architectural impacts of electrical code requirements
Slide 3 SL1 Needs a 4th learning objective Sara Lavado, 3/15/2013
Basics of Electrical Engineering V = Voltage The force behind electricity I = Current (amperes) The volume of flow of electricity R = Resistance (ohms) The resistance to the flow W = Power (watts) Measure of work
Basics of Electrical Engineering Ohm s Law V = Voltage I = Current (amperage) R = Resistance V = I * R
Basics of Electrical Engineering DC = Direct Current AC = Alternating Current
Basics of Electrical Engineering Power V = Voltage I = Current (amperage) P = Power (watts) (AC & DC) VA = Volt-amperes (AC) P = V * I * pf (power factor)
Basics of Electrical Engineering AC Power VA = V * I P = V * I * pf (power factor)
Basics of Electrical Engineering Three phase AC Power
Basics of Electrical Engineering Three phase AC Power
Basics of Electrical Engineering Power Losses P = V * I P = (I*R) * I P = I 2 * R
Basics of Electrical Engineering Power Losses 10,000 kw: 480V * 21A (#10, 3.3 ohms/3,000 ft) 240V * 42A (#6, 1.3 ohms/3,000 ft)
Basics of Electrical Engineering Power Losses P = I 2 * R 21 2 * 3.3 ohms = 1,450 VA loss 42 2 * 1.3 ohms = 2,300 VA loss
Basics of Electrical Engineering Transformers 240V * 42A 480V * 21A Power is constant
Scope of the NEC Installations Wiring Methods Wiring Materials Equipment Special Conditions (emergency and stand by)
Scope of the NEC, MA amendments
Scope of the NEC, MA amendments
Scope of the NEC, Installations Working Space/ Working Clearance
Scope of the NEC, Installations Working Space Working Clearance
Scope of the NEC, Installations Working Space Working Clearance
Scope of the NEC, Installations Working Space Working Clearance
Scope of the NEC, Installations Working Space Working Clearance
Emergency & Stand-By Power Scoping requirements for each are in the Building Code Emergency Power: Exit Signs Egress Lighting Elevator (travel >70 feet, 524 CMR) High Rise: Fire Pump Elevator Fire Alarm and Detection Systems Voice Evacuation
Emergency & Stand-By Power Legally Required Stand-by Power: High Rise: Fire Command Center Smoke Control systems
Emergency & Stand-By Power Sources of Emergency and Stand-by Power: Generators Batteries
Emergency & Stand-By Power Sources of Emergency and Stand-by Power: Separate Service Fuel Cells
Emergency & Stand-By Power Installation Requirements of Emergency and Stand-by Power Two Hour Separation required for Prime Mover ATS Smoke Control Controls Emergency Only: Feeders to Panelboards
Architectural Impacts Room Sizes Room Locations Room Ratings Shafts
Thank you for your time! Questions? This concludes The American Institute of Architects Continuing Education Systems Program Doug Anderson danderson@c3boston.com 313 Congress Street Boston, MA 02210 617.330.9390 617.330.9383 fax www.c3boston.com
C 3 Services: MEP / FP Engineering Due Diligence Construction Management Owner s Representatives Development Advisory Code Advisory Building Envelope 313 Congress Street Boston, MA 02210 617.330.9390 617.330.9383 fax www.c3boston.com