Black Max BM905511, Operator'S Manual

Page 2  — English

 WARNING:

GROUNDING THE GENERATOR

If this generator will be used 

only

 with cord and plug-connected equipment, 

National Electric Code does not require that the unit be grounded. However, 
other methods of using the generator may require grounding to reduce the risk 
of shock or electrocution. Consult a qualified electrician, electrical inspector, 
or local agency having jurisdiction for local codes or ordinances to find out if 
grounding is needed in your situation before using the generator. 
When grounding is required, the nut and ground terminal on the frame are 
used to connect the generator to a suitable ground source. The ground path 
should be made with #8 size wire. Connect the terminal of the ground wire 
between the lock washer and the nut, and tighten the nut fully. Connect the 
other end of the wire securely to a suitable ground source that is in contact 
with the soil for a minimum distance of 8 ft.
The National Electric Code contains several practical ways in which to 
establish a good ground source. If a steel or iron rod is used, it should be at 
least 5/8 in. diameter, and if a nonferrous rod is used, it should be at least 
1/2 in. diameter and be listed as material for grounding. If a rock bottom is encountered before reaching a depth of 
8 ft., drive the ground rod in at an angle of up to 45

°

. If the rock bottom is again encountered,  the rod can be buried 

in a trench that is at least 30 in. deep. In all cases, the upper end of the grounding rod should either be flush with (or 
below) the ground or must be otherwise protected from physical damage.
All electrical tools and appliances operated from this generator must be properly grounded by use of a third wire or 
be “Double Insulated.”
It is recommended to:

1.  Use electrical devices with 3-prong grounded plugs.
2.  Use an extension cord intended for outdoor use with a 3-pole receptacle and a 3-prong plug at opposite ends to 

ensure continuity of the ground protection from the generator to the appliance.

Check and adhere to all applicable federal, state, and local regulations relating to grounding specifications. Consult a 
qualified electrician or service personnel if the grounding instructions are not completely understood or if in doubt as 
to whether the generator is properly grounded.

KEEP AT LEAST

20 FT.   AWAY

CO Detector 

in Living Areas

Only use OUTSIDE and 

FAR AWAY from windows, 

doors, and vents.

 Exhaust (CO)

Direct exhaust AWAY 

from all windows, doors, 

and vents.

LOCATE GENERATOR AT LEAST 20 FT.* AWAY TO REDUCE THE 
RISK OF CARBON MONOXIDE GETTING INSIDE THE HOME

*

Minimum distance as recommended by U.S. Department of Health and Human 
Services Centers for Disease Control and Prevention (www.cdc.gov/co). Your specific 
home and/or wind conditions may require additional distance.

To register your Black Max  product,  

please visit: www.blackmaxtools.com