Ab c, Practical guide to electrical grounding – ERICO Practical Guide to Electrical Grounding User Manual
Page 125
Practical Guide to Electrical Grounding
118
Outbuilding
Outbuilding
Xformer
Underground Service
Underground Service
Meter
Meter
Meter
A
B
C
Service
Entrance
Service
Entrance
Service
Entrance
¥ Equipment or outlets and long
branch circuits
¥ All outlets at more than 10m (30 feet)
from Category B
¥ All outlets at more than 20m (60 feet)
from Category C
¥ Feeders and short branch circuits
¥ Distribution panel devices
¥ Bus and feeder industrial plants
¥ Heavy appliance outlets with "short"
connection to service entrance
¥ Lightning systems in large buildings
¥ Outside and service entrance
¥ Service drop from pole to building
¥ Run between meter and panel
¥ Overhead line to detached building
¥ Underground line to well pump
Demarcation between Location Categories B and C is arbitrarily taken to be at the meter or at the main disconnect
(ANSI/NFPA 70-1990, Article 230-70) for low voltage service, or at the secondary of the service transformer if the service is
provided to the user at a higher voltage.
Location Categories For SPD’s
Fig. 7-1
Grounding Book 4/14/99 10/5/99 6:02 PM Page 118 (Black plate)
- 6Z34VF14 Rod Hanging Basket Tray Clip (1 page)
- 766PM Far Side Box Support (1 page)
- 766PMD Far Side Box Support (1 page)
- CADDY MPVTI Low Voltage Mounting Clip (2 pages)
- H-Series CADDY PYRAMID Support System (3 pages)
- CADDY PYRAMID RL, PIPE RETAINERS (2 pages)
- CADDY PYRAMID Rooftop Equipment Support (4 pages)
- CADDY PYRAMID Single Post Support (1 page)
- CADDY PYRAMID TF Series, Fixed Height Tool-Free Supports (2 pages)
- CADDY ROD LOCK Anchor Screw (2 pages)
- CADDY ROD LOCK Beam Clamp (2 pages)
- CADDY ROD LOCK Channel Nut (2 pages)
- CADDY ROD LOCK L-Bracket (2 pages)
- CADDY ROD LOCK Strut (2 pages)
- CADDY SPEED LINK Riveted Accessories (4 pages)
- CADDY SPEED LINK SLK-Keyless Locking Device and Bulk Cable (2 pages)
- CADDY SPEED LINK SLK-Keyless Locking Devices (2 pages)
- CADDY SPEED LINK-Accessory Cables (1 page)
- CADDY SPEED LINK-SLK Cable End Accessories (4 pages)
- TSGB Series Screw Gun Bracket (2 pages)
- GLIDER Electrical Box Attachment (2 pages)
- H Series-Electrical Box Bracket (2 pages)
- ROD LOCK Plywood Pre-set Anchor (2 pages)
- ROD LOCK Strut End Bracket (2 pages)
- ROD LOCK Strut (2 pages)
- CADDY ROD LOCK Strut Nut (2 pages)
- CER4 Cable from Stud (2 pages)
- High Performance CADDY CAT HP J-Hook Assemblies (6 pages)
- KBT Wire Basket Tray Clip (1 page)
- MPCB1220 (2 pages)
- SBC Series, Beam Clamp, 3/8" and M10 (1 page)
- TSR200 Telescoping Strut Replacement Bracket (2 pages)
- TSRBS1625 Telescoping Box (3 pages)
- Universal Pedestal Clamp (2 pages)
- Branch Line Restraint Device (2 pages)
- Branch Line Restraint Strucural Attachment Fitting for Steel 12 gauge (2 pages)
- Branch Line Restraint, Structural Attachment Fitting for Concrete or Wood (2 pages)
- Branch Line Restraint, Structural Attachment Fitting with 3/8"-16 male thread" (2 pages)
- 510 CADDY EZ RISER (2 pages)
- 429 CADDY MACROFIX PLUS NI (1 page)
- Seismic Hanger Clamps (3 pages)
- CADDY PYRAMID Equipment Supports (3 pages)
- CADDY ROD LOCK Bottom-Mount Duct Bracket (2 pages)
- Bottom-Mount Duct Bracket, Narrow (2 pages)
- Top-Mount Duct Bracket (2 pages)