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LugsDirect.com
Operated By:
Advancement International Ltd.
595 Circlewood, Aurora, OH 44202(USA)
Email: sales@LugsDirect.com
Phone: 330-562-8983 | FAX: 330-562-9990
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International Hydraulics Inc

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Electrical Connectors

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Differences Between Switchboards, Switchgears, and Panelboards

 

Buy Panelboard, Switchboard, and Switchgear Lugs

 

 

What Are the Main Differences

Between Switchgear, Switchboards, and Panelboards?

Switchgear
Switchboards
Panelboards
Substations
Industrial
Standards
ANSI STD C37.20.1
UL STD 1558
NEMA STD SG-5
NEMA PB-2
UL 891
NEMA PB-1
UL 67
UL 50
Lug Standards
Lug Mounting Bolt Configuration
Dielectric Voltage
2200 V
2X Rated Volts + 1000V
2X Rated Volts + 1000V
In Use Voltages
Nominal Voltage + 5.8%
Nominal Voltage 240V, 480V, 600V
Circuit Protection

LV PCB
(Low Voltage power curent breakers)
ANSI 37-13
NEMA SG-3
UL1066

ICCB In Circuit Circuit Breaker
Molded Case Circuit Breaker
MCCB UL 489
Fusible Switches UL508 and UL 977
Fusible Switches UL 98
Power Circuit Breaker UL 1066
5000A Max Main
Molded Case Circuit Breaker
MCCB UL 489
Fusible Switches UL 98
1200A Max Main
Short Circuit Test
Unfused 15% PF (Power Factor) 30 cycles
20% PF (Power Factor) 3 cycles
Must have "instantaneous" trip
funtion to maintain UL 891 rating
Panel Mounting and Access
Generally requires rear and front access which takes up more space
Free Standing
May be mounted against a wall if < 45" deep allowing front access only but saves space
Front or rear access
Flush or surface wall-mounted with front access only
Cost Continuity of Power
Generallly higher cost but increased power continuity likelihood
Generally lower cost but more likely than switchgear to have a power trip outage
Phases
Usually 3 phase
1 or 3 phase

 

 

NEMA Bolt Hole Deminsional Requirements for Terminal Connectors

 


nema 1 hole layout

 

Ref. ANSI/NEMA CC 1-2009 Electric Power Connection for Substations, Annex C

 

 

 

Alternate mounting hole spacing and bolt size, non NEMA standard

1 3/8SPACING 3/8 MOUNTING BOLT LAYOUT

 

 

Buy Panelboard, Switchboard, and Switchgear Lugs

 

 

Information is provided based on the best of knowledge and belief and in the spirit of sharing information as a starting point in the study of a complex subject. Nothing stated here is guaranteed to be correct, or unbiased, nor is information maintained to be up to date. IHI and Advancement International Ltd do not guarantee any end use application performance levels unless pre-agreed in writing but will replace any IHI product that is shown to be, in substance, not made to print or made with faulty material or workmanship. 

 

 

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