# Grounding Arrangement for A Road Tanker Grounding Point

The ZANDZ Technical Centre has received a request to calculate the grounding arrangement for a road tanker grounding point. Let's consider the solution offered by the technical center's specialists.

The activities have been performed according to:

1.  GOST 12.4.124-83

Data provided for calculation:
Soil resistivity accepted for calculations is 100 Ohm*m.

It is necessary to calculate the grounding arrangement to protect from static voltage.

According to item 2.6.2 of GOST 12.4.124-84, the grounding arrangement resistance should be not more than 100 Ohm.

A set of measures ensuring compliance with the requirements to the grounding system is based on the following solutions:

• a grounding arrangement is made using a 1.5 m copper-plated vertical grounding arrangement. Depth should be at least 0.5-0.7 meters;

• it is connected to the grounding arrangement using clamp ZZ-005-064.

Calculation of a grounding arrangement resistance for 1 point:

Vertical electrode resistance:

Верт - Vert
Экв - Eq
Ом - Ohm

where ρ  – is equivalent soil resistivity, 100 Ohm·m;

L is vertical electrode length, 1.5 m;

d is vertical electrode diameter, 0.014 m;

T is deepening;

, where t is the distance from the ground surface to the grounding arrangement, 0.5 m;

rated resistance of the grounding arrangement is 60,23 Ohm, which is less than the required value of 100 Ohm.

Table 1. List of required materials.

 № Part number Name Quantity, pcs. 1. ZZ-001-065 ZANDZ Copper-plated threaded grounding rod (D14; 1,5 m) 1 2. ZZ-002-061 ZANDZ Threaded coupling 1 3. ZZ-003-061 ZANDZ Termination 1 4. ZZ-004-060 ZANDZ Guide head for jackhammer attachment 1 5. ZZ-005-064 ZANDZ Conductor connection terminal (up to 40 mm) 1 6. ZZ-007-030 ZANDZ Waterproofing tape 1 7. ZZ-008-000 ZANDZ Attachment to the hammer (SDS max) 1