Designing Electrical Room
This document was uploaded by user and they confirmed that they have the permission to share it. If you are author or own the copyright of this book, please report to us by using this DMCA report form. Report DMCA
Overview
Download & View Designing Electrical Room as PDF for free.
More details
- Words: 986
- Pages: 34
Loading documents preview...
Electrical Systems: Designing electrical rooms Join the discussion about this Webcast on Twitter at #CSEelectricalroom
Sponsored by:
Presenters: Brian Martin, PE, Portland Electrical Department Manager CH2M Hill Portland, Ore.
Brian Rener, PE, LEED AP, Associate SmithgroupJJR, Chicago, Ill.
Moderator: Jack Smith, Consulting-Specifying Engineer and Pure Power, CFE Media, LLC
Electrical Systems: Designing electrical rooms Brian Martin, PE, Portland Electrical Department Manager CH2M Hill Portland, Ore. Brian Rener, PE, LEED AP, Associate SmithgroupJJR , Chicago, Ill.
Presentation scope • • • • • •
NFPA 70 (NEC) 2014 International Building Code (IBC) 800 A and Above Primary services No hazardous locations Good engineering practices
Electrical room design • Needs a coordinated team: • • • • •
Electricals Architects Structural Mechanicals Fire protection
Room types • • • • • •
Primary service rooms Electrical rooms UPS or battery rooms Generator rooms Computer rooms Utility vaults
Design issues • • • • • • • •
Working vs. dedicated spaces Dedicated spaces and foreign systems Fire protection Fire ratings Ventilation Structural Building occupancy Lighting
Working vs. dedicated spaces • Different spaces – Worker vs. equipment
Working vs. dedicated spaces • Different spaces – Worker vs. equipment
Working space • Applies to: – “Equipment operating at 600 V, nominal, or less, to ground and likely to require examination, adjustment, servicing, or maintenance while energized.” NEC Article 110.26(A) • • • • • • • • •
Switchboards Switchgear (Added in 2014) Motor control centers Panelboards Disconnect switches Circuit breakers Controllers Controls for HVAC equipment Transformers sometimes fall into this category
Working space: table
Working space: elevations
Nonelectrical parts “Where rear access is required to work on nonelectrical parts on the back of enclosed equipment, a minimum horizontal working space of 30 in. shall be provided.” NEC Article 110.26(A)(1)a
Dedicated spaces • Applies to: • “All switchboards, switchgear, panelboards, and motor control centers shall be located in dedicated spaces and protected from damage.” NEC Article 110.26(E) • Switchboards • Switchgear (Added in 2014) • Panelboards • Motor control centers
Dedicated spaces and foreign systems • Can you have foreign systems (mechanical ducts and/or plumbing) in your electrical room? – Yes and no • Understand dedicated space
Foreign systems (MP) • NEC: above, if protected
• What about sprinklers? • NEC: okay in dedicated space
2014 NEC change • Outdoor spaces – New requirement now calls for the same basic dedicated equipment or electrical space for outdoor installations that has been in effect for indoor installations – This space above and below the electrical equipment should be dedicated
Primary equipment • Switchboard vs. switchgear • Switchboards: UL 891 – Front access – Rear access – Primarily fixed mounted
Primary equipment • Switchboard Vs Switchgear • Switchgear - ANSI C37 – Rear Access – Primarily Drawout Construction
Access • 1200 amps & 6 feet in width – Two doors on opposite ends – Doors 6’ 1/2’’ x 24” – One door if working clearance doubled – Doors Swing Out
• 800 A (New to NEC 2014) – Listed Panic Hardware on Doors
Access: plan examples
Beyond NEC: working space and access • • • • •
Doors: at least 36 in. wide or double 36 in., 9 ft. high Access to drawout devices Would you want to work in only 3½ ft? Breaker truck access NFPA 70E: Standard for Electrical Safety in the Workplace - arc flash zones • Arc flash gear, venting • Height above switchboards • Space planning: work with your architect
Fire protection • Sprinklers – NFPA 13: yes, or 2 hr rating – Some cities: preaction
• Fire detection – Smoke detectors in electrical rooms – Recommend heat and flame detection in generator rooms
Fire ratings • Do electrical rooms need to be fire rated? – NEC • Not if sprinklered
– What about dry type transformers? • 112.5 kVA, 155 C or higher insulation
• Emergency systems (NEC Article 700) – NEC high rise or high occupancy • Approved fire suppression • 2-hr systems
Fire ratings • NFPA 110 – EPS installed in a separate room for Level 1 systems – Room must have a 2-hr rating
• Know your local codes – Example: City of Chicago • Generator room rating: 3 hr • Fuel storage: 550-gal limit • Not located more 2 floors up or down from grade.
• Insurance carrier requirements
Ventilation • • • •
Required? General rating of equipment: 104 F Recommend: 86 F Electrical rooms – Without transformer: 1 cfm/sq. ft. – With transformer: 1.0% to 2.0% of kVA (3 cfm/kVA)
• Generator rooms – – – –
Cooling vs. combustion air After engine shuts down Remote radiator 2,500 Btu/hr/kVA
Ventilation • Battery/UPS rooms – Keep temperature around 77 F – What about hydrogen? • Flooded (vented) batteries • Valve regulated, sealed • Conflicting codes: NEC, UFC, IFC
– Safe rules • 1 cfm/sq. ft. • Fan failure relay
Structural • Often overlooked – – – – – –
Switchboards and switchgear Generators Vibration isolation Computer rooms Raised floors Miscellaneous • • • •
Pads Penetrations Fire sealing Path of delivery
Lighting • Recommended lighting levels – IES and NFPA 70E: 30 foot-candles
• Emergency lighting – 1 foot-candle is not enough
• Switching – Must include nonautomatic means
Miscellaneous room issues • EMI • Noise
Codes and Standards References from Today’s Webcast • • • • •
NFPA 70 (NEC) 2014 International Building Code (IBC) UL 891 ANSI C37 NFPA 70E: Standard for Electrical Safety in the Workplace • NFPA 110 • IES
Presenters: Brian Martin, PE, Portland Electrical Department Manager CH2M Hill Portland, Ore.
Brian Rener, PE, LEED AP, Associate SmithgroupJJR, Chicago, Ill.
Moderator: Jack Smith, Consulting-Specifying Engineer and Pure Power, CFE Media, LLC
Webcasts and Research • Smart Electrical Systems: Meters, submeters and smart meters
• 2013 Electrical and Power study
Electrical Systems: Designing electrical rooms Join the discussion about this Webcast on Twitter at #CSEelectricalroom
Sponsored by:
Sponsored by:
Presenters: Brian Martin, PE, Portland Electrical Department Manager CH2M Hill Portland, Ore.
Brian Rener, PE, LEED AP, Associate SmithgroupJJR, Chicago, Ill.
Moderator: Jack Smith, Consulting-Specifying Engineer and Pure Power, CFE Media, LLC
Electrical Systems: Designing electrical rooms Brian Martin, PE, Portland Electrical Department Manager CH2M Hill Portland, Ore. Brian Rener, PE, LEED AP, Associate SmithgroupJJR , Chicago, Ill.
Presentation scope • • • • • •
NFPA 70 (NEC) 2014 International Building Code (IBC) 800 A and Above Primary services No hazardous locations Good engineering practices
Electrical room design • Needs a coordinated team: • • • • •
Electricals Architects Structural Mechanicals Fire protection
Room types • • • • • •
Primary service rooms Electrical rooms UPS or battery rooms Generator rooms Computer rooms Utility vaults
Design issues • • • • • • • •
Working vs. dedicated spaces Dedicated spaces and foreign systems Fire protection Fire ratings Ventilation Structural Building occupancy Lighting
Working vs. dedicated spaces • Different spaces – Worker vs. equipment
Working vs. dedicated spaces • Different spaces – Worker vs. equipment
Working space • Applies to: – “Equipment operating at 600 V, nominal, or less, to ground and likely to require examination, adjustment, servicing, or maintenance while energized.” NEC Article 110.26(A) • • • • • • • • •
Switchboards Switchgear (Added in 2014) Motor control centers Panelboards Disconnect switches Circuit breakers Controllers Controls for HVAC equipment Transformers sometimes fall into this category
Working space: table
Working space: elevations
Nonelectrical parts “Where rear access is required to work on nonelectrical parts on the back of enclosed equipment, a minimum horizontal working space of 30 in. shall be provided.” NEC Article 110.26(A)(1)a
Dedicated spaces • Applies to: • “All switchboards, switchgear, panelboards, and motor control centers shall be located in dedicated spaces and protected from damage.” NEC Article 110.26(E) • Switchboards • Switchgear (Added in 2014) • Panelboards • Motor control centers
Dedicated spaces and foreign systems • Can you have foreign systems (mechanical ducts and/or plumbing) in your electrical room? – Yes and no • Understand dedicated space
Foreign systems (MP) • NEC: above, if protected
• What about sprinklers? • NEC: okay in dedicated space
2014 NEC change • Outdoor spaces – New requirement now calls for the same basic dedicated equipment or electrical space for outdoor installations that has been in effect for indoor installations – This space above and below the electrical equipment should be dedicated
Primary equipment • Switchboard vs. switchgear • Switchboards: UL 891 – Front access – Rear access – Primarily fixed mounted
Primary equipment • Switchboard Vs Switchgear • Switchgear - ANSI C37 – Rear Access – Primarily Drawout Construction
Access • 1200 amps & 6 feet in width – Two doors on opposite ends – Doors 6’ 1/2’’ x 24” – One door if working clearance doubled – Doors Swing Out
• 800 A (New to NEC 2014) – Listed Panic Hardware on Doors
Access: plan examples
Beyond NEC: working space and access • • • • •
Doors: at least 36 in. wide or double 36 in., 9 ft. high Access to drawout devices Would you want to work in only 3½ ft? Breaker truck access NFPA 70E: Standard for Electrical Safety in the Workplace - arc flash zones • Arc flash gear, venting • Height above switchboards • Space planning: work with your architect
Fire protection • Sprinklers – NFPA 13: yes, or 2 hr rating – Some cities: preaction
• Fire detection – Smoke detectors in electrical rooms – Recommend heat and flame detection in generator rooms
Fire ratings • Do electrical rooms need to be fire rated? – NEC • Not if sprinklered
– What about dry type transformers? • 112.5 kVA, 155 C or higher insulation
• Emergency systems (NEC Article 700) – NEC high rise or high occupancy • Approved fire suppression • 2-hr systems
Fire ratings • NFPA 110 – EPS installed in a separate room for Level 1 systems – Room must have a 2-hr rating
• Know your local codes – Example: City of Chicago • Generator room rating: 3 hr • Fuel storage: 550-gal limit • Not located more 2 floors up or down from grade.
• Insurance carrier requirements
Ventilation • • • •
Required? General rating of equipment: 104 F Recommend: 86 F Electrical rooms – Without transformer: 1 cfm/sq. ft. – With transformer: 1.0% to 2.0% of kVA (3 cfm/kVA)
• Generator rooms – – – –
Cooling vs. combustion air After engine shuts down Remote radiator 2,500 Btu/hr/kVA
Ventilation • Battery/UPS rooms – Keep temperature around 77 F – What about hydrogen? • Flooded (vented) batteries • Valve regulated, sealed • Conflicting codes: NEC, UFC, IFC
– Safe rules • 1 cfm/sq. ft. • Fan failure relay
Structural • Often overlooked – – – – – –
Switchboards and switchgear Generators Vibration isolation Computer rooms Raised floors Miscellaneous • • • •
Pads Penetrations Fire sealing Path of delivery
Lighting • Recommended lighting levels – IES and NFPA 70E: 30 foot-candles
• Emergency lighting – 1 foot-candle is not enough
• Switching – Must include nonautomatic means
Miscellaneous room issues • EMI • Noise
Codes and Standards References from Today’s Webcast • • • • •
NFPA 70 (NEC) 2014 International Building Code (IBC) UL 891 ANSI C37 NFPA 70E: Standard for Electrical Safety in the Workplace • NFPA 110 • IES
Presenters: Brian Martin, PE, Portland Electrical Department Manager CH2M Hill Portland, Ore.
Brian Rener, PE, LEED AP, Associate SmithgroupJJR, Chicago, Ill.
Moderator: Jack Smith, Consulting-Specifying Engineer and Pure Power, CFE Media, LLC
Webcasts and Research • Smart Electrical Systems: Meters, submeters and smart meters
• 2013 Electrical and Power study
Electrical Systems: Designing electrical rooms Join the discussion about this Webcast on Twitter at #CSEelectricalroom
Sponsored by:
Related Documents
Designing Electrical Room
January 2021 1
Electrical Designing
January 2021 1
Designing The X-ray Room And Dark Room
February 2021 1
Tactical Room
January 2021 2
War Room
January 2021 3
Designing Interfaces
March 2021 0More Documents from "mtzman"
Designing Electrical Room
January 2021 1
