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Section 4 |
Important Safety
Information
www.pflow.com
P 414 352 9000
F 414 352 9002
6720 N. Teutonia Ave.
Milwaukee, WI 53209
Electrical
Safety
Precautions
Working on
Energized
Circuits
Notes for the
Installation
Electrician
High Voltage!
To prevent serious injury, death, or property damage, all
electrical connections and permanent wiring must be installed by a licensed
electrician in accordance with applicable local or national electrical codes.
Arc flash and shock hazard appropriate PPE is required. This equipment must
be adequately grounded in accordance with local electrical codes or, in the
absence of local codes, with the current edition of the National Electrical Code
NFPA No. 70.
When electrical repair or maintenance work is required that prohibits de-energizing
the circuits involved, extreme caution must be used. The work should be completed
only by authorized, well trained and supervised personnel who are fully aware of the
dangers involved. All practical safety measure must be used to protect the personnel
performing the required work. In addition to the NFPA No. 70 codes, the following
precautions
must
be taken:
1. Remove all wristwatches, watch chains, rings, necklaces, metal appendages to
clothing, oversized metallic belt-buckles, metal piercings, or loose clothing. These
items have the potential to make accidental contact with energized surfaces. In
addition, secure long hair with a hair net or cover with a plastic helmet.
2. Remove all hair barrettes or bobby pins. These items are electrically conductive and
accidental contact may cause serious personal injury.
3. Wear dry clothing and shoes. Moisture should not be present on the soles of shoes.
Water is electrically conductive and accidental contact may cause death or serious
personal injury.
4. Insulate the worker from the ground. Cover any adjacent grounded metal surfaces
with an insulating material. Suitable insulating materials are dry wood, rubber
mats, dry canvas, dry phenolic material, or heavy, multi-ply paper (cardboard).
Make sure that the insulating material has no holes present and there are no
conductive materials (e.g., staples) embedded. Cover a sufficient area with the
insulating material to make sure that adequate space is permitted for worker
movement.
5. Use insulated tools when working on energized circuits or fuse box. These insulated
tools must be rated to withstand the voltage of the energized circuits.
The installation electrician must take the following precautions:
1. Locate and review the electrical schematics furnished with the equipment.
2. Verify the proper fit-up, wiring and operation of all required electrical components.
3. Mount the push button station out of reach of someone located on the carriage
(approximately six feet [1829mm]).
4. Wire standard lift limit switches on the chain tensioning assembly (see the job
specific electrical schematic as required) for mechanical VRCs as follows:
If the tensioner chain becomes slack causing the arm on the limit switch to move
down or if a strong tension is exerted on the tensioner chain causing the arm to
move up, there is a break in the control power. The limit switches are designated
with an LS# on the electrical schematic.
