Presentation to AMCHAM Shanghai 2009 - difference between TIA 942 and GB50173 datacenter standards

1. KEEPING TO CODE
comparison between
US & China standards
Jeffrey Lam RCDD

2. Data Center Standards
Comparison between
EIA/TIA 942 & GB 50174 -2008

3. ANSI / TIA 942
Telecommunications Infrastructure Standard for Data Centers
Published by Telecommunications Industry Association
Recognised by American National Standards Institue
Published in 2005
GB 50174 (2008)
Code for Design of Electronic Information System Room
Published by China Electronics Engineering Design Institute
Designated as Guo Biao ( 国标） or National Standards
Published in 2008
US vs China “National” standards

4. ANSI / TIA 942A
Tiering system
• Tier 1 Basic Data Center
• Tier 2 Redundant Components
• Tier 3 Concurrently maintainable
• Tier 4 Fault tolerant
GB 50174 (2008)
Class system
• C Basic model
• B Redundant
• A Fault-tolerant-type
Classification of DC for comparison

5. Where items are not explicably allowed / restricted, the following
terms are used in the standards
ANSI / TIA 942A

Not recommended

No requirement

No restriction

Not applicable

Minimum code requirements
Classification of DC for comparison
GB 50174 (2008)
可 － permissable/ optional
应 － should be used
宜 － advisable

6. Comparison - Locations
TIA
TIER
Proximity to airports
GB
CLASS
TIER 1
not applicable GB Class C
TIER 2
TIER 3 Not less than 1.6 km. GB Class B
TIER 4 Not less than 8 km GB Class A
TIA
TIER
Proximity to major traffic arteries
GB
CLASS
TIER 1
not applicable GB Class C
TIER 2
TIER 3 Not less than 91 m
Not less than
100 m
GB Class B
TIER 4 Not less than 800 m GB Class A

7. Comparison - Locations
TIA
TIER
Proximity to flood hazard area as mapped on a
federal Flood Hazard Boundary or Flood
Insurance Rate Map
GB
CLASS
TIER 1 No requirement
Not advisable to
located
Class C
TIER 2 not within flood hazard area
Should not be
located
Class B
TIER 3
Not within 100-year flood hazard
area or less than 91 m / 100 yards
from 50-year flood hazard area Class A
TIER 4
Not less the 91 m from 100-year flood
hazard area

8. Comparison - Power
ANSI/TIA
TIERS
Utility Entrance
GB
CLASSES
TIER 1
Single Feed Class C
TIER 2
TIER 3 Dual feeds
Dual feeds from
different sources.
Class B
TIER 4
Dual feeds from diff.
substations
Class A

9. Comparison - Genset
TIA
TIERS
Back-up diesel generator system
GB
CLASSES
not mentioned Class C
TIER 1 8 hrs
TIER 2 24 hrs Class B
TIER 3 72 hrs Class A
TIER 4 96 hrs

10. Comparison – UPS
ANSI/TI
A
TIERS
UPS Redundancy
GB
CLASSE
S
TIER 1
N Class C
TIER 2
TIER 3 N+1
N+X
Class B
TIER 4 2N
2N or M(N+1) Class A

11. Comparison – CRAC/CRAH
ANSI/TIA
TIERS
CRAC / CRAH
GB
CLASSES
TIER 1 No redundant Unit N Class C
TIER 2
1 redundant Unit per critical
area
N+1 Class B
TIER 3 Redundancy to maintain
continunity during loss of one
source of power
TIER 4 N+X Class A