Contax SW 2524, Руководство пользователя, Страница: 43 / 322

Pre-Configuration Planning
976-0043-01-01 2–9
grounding electrode. The rod should be 5/8 inch (16 mm) round by 8 feet
(2 meters) long and driven into the earth. It is also common to use copper
wire placed in the concrete foundation of the building as a grounding
system. Either method may be acceptable, but the local code will prevail.
Connection to the ground electrode should be done with special clamps
located above ground where they can be periodically inspected.
Many large systems use multiple ground rods. The most common
example is providing a direct path from the solar array to earth near the
location of the solar array. Most electrical codes want to see the multiple
ground rods connected by a separate wire with its own set of clamps. If
this is done, it is a good idea to make the connection with a bare wire
located outside of the conduit (if used) in a trench. The run of buried wire
may be a better grounding electrode than the ground rods. Well casings
and water pipes can also be used as grounding electrodes. Under no
circumstance should a gas pipe or line be used.
Bonding the Grounding System
Bonding means connecting one of the current-carrying conductors
(usually the AC neutral and DC negative) to the grounding system. When
the other ungrounded conductor (the hot or positive) touches the
grounding system, current will flow through it to the point of connection
to the grounded conductor and back to the source. This will cause the
over-current protection to stop the flow of current, protecting the system.
This point of connection between the grounding system (ground rod), the
current carrying grounded conductor (AC neutral and DC negative), and
the equipment grounding conductor (green ground wire, equipment
ground) is called a “bond”.
Bonding location Bonding is usually located in the over-current protection device
enclosures (both AC and DC). Although it can be done at the inverter,
codes do not generally allow it since the inverter is considered a
Note: This inverter, along with all other power electronic devices in
your system, are subject to severe damage from the effects of lightning.
Lightning damage is NOT covered by your warranty. If your installation
is in an area of high probability for lightning, you should consult with a
local lightning expert or your authorized Xantrex installer to determine
what extra precautions should be taken to protect your equipment.
Important: Consult local codes and the NEC for more information.