13
NeC (700, 701, 702) Comparison
Article 700 - Emergency
Article 701 - Standby
Article 702 - Optional Standby
Scope
Legally required life safety
Legally required critical support
(fire fighting, health hazards, etc)
Protect property & facilities
Equipment Approval
For Emergency / (UL2200)
For Intended Use / (UL2200)
For Intended Use / (UL2200) / Not in 2008
Testing
Witness Testing (on-sight)
At install & periodically
At install
None
Periodic Testing
Yes
Yes
None
Battery Maintenance
Yes
Yes
None
Maintenance Records
Yes
Yes
None
Load Testing
Yes
Yes
None
Capacity
All Loads
All loads intended to operate at one time
All loads intended to operate at one time /
Not in 2008
Other Standby Loads Allowed
Yes with load shedding
Yes with load shedding
2008 – Yes with load shedding
Peak Shaving Allowed
Yes
Yes
Yes
Transfer Switch
Automatic
Yes
Yes
No
Equipment Approval
For Emergency / (UL1008)
For Standby / (UL1008)
For Intended Use / (UL1008)
Means to Permit Bypass
Yes
No
No
Elect. Operated - Mech. Held
Yes
No
No
Other loads
No
Yes with load shedding
N/A
Max. Fault Current Capable
Yes
Yes
Yes
Signals
(Audible &
Visual)
Derangement
Yes / Standard common alarm
Yes / Standard common alarm
Yes / Standard common alarm
Carrying Load
Yes / Displayed at ATS
Yes / Displayed at ATS
Yes / Displayed at ATS
Battery Charger Failed
Yes
Yes
No
Ground Fault Indication
Yes (480V & 1000A)
No
No
NFPA 110 Signaling
Yes / Optional annunciator
Yes / Optional annunciator
No
Signs
At service
Yes / Type & location
Yes / Type & location
Yes / Type & location
At neutral to ground bonding
Yes (if remote)
Yes (if remote)
Yes (if remote)
Wiring kept independent
Yes
No
No
Fire protection (ref 700-9d)
Yes (1000 persons or 75' building)
No
No
Maximum power outage
10 sec
60 sec
N/A
Retransfer delay
15 min setting
15 min setting
No
Automatic starting
Yes
Yes
No
On-site fuel requirements
2 hours (see NFPA 110)
2 hours
None
Battery charger
Yes
Yes
No
Ground Fault
Indication Only
No
No
TO FIND
KNOWN VALUES
1-PHASE
3-PHASE
KILOWATTS (kW)
Volts, Current, Power Factor
E x I
1000
E x I x 1.73 x PF
1000
KVA
Volts, Current
E x I
1000
E x I x 1.73
1000
AMPERES
kW, Volts, Power Factor
kW x 1000
E
kW x 1000
E x 1.73 x PF
WATTS
Volts, Amps, Power Factor
Volts x Amps
E x I x 1.73 x PF
NO. OF ROTOR POLES
Frequency, RPM
2 x 60 x Frequency
RPM
2 x 60 x frequency
RPM
FREQUENCY
RPM, No. of Rotor Poles
RPM x Poles
2 x 60
RPM x Poles
2 x 60
RPM
Frequency, No. of Rotor Poles
2 x 60 x Frequency
Rotor Poles
2 x 60 x Frequency
Rotor Poles
kW (required for Motor)
Motor Horsepower, Efficiency
HP x 0.746
Efficiency
HP x 0.746
Efficiency
RESISTANCE
Volts, Amperes
E
I
E
I
VOLTS
Ohms, Amperes
I x R
I x R
AMPERES
Ohms, Volts
E
R
E
R
E = VOLTS
I = AMPERES
R = RESISTANCE (OHMS)
PF = POWER FACTOR
Electrical Formulas
NEC Comparison Table to be used as a general guideline in determining the proper generator for specific applications. Refer to architectural documents for final selection.
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