Introduction: fragment of  letter from Ministry of Environment Protection of 04.11.97

"According to art. 8 ust. 1 pkt. 6 of the Statute dated 18th of April 1985 on inland fisheries, it is forbidden to fish with electric tools not conforming with valid standards. The valid one in this matter is the Branch Standard BN-74/919701 "Electric equipment in fishery. Equipment for fishing and barriers for fish way in inland waters" However, it does not exclude usage of electric equipment supplied with alternate current.

The electric fishing equipment presently used in inland fishery is supplied with direct current creating electric field, which causes only electronarcosis effect of short duration, depending on fish total lenght"

I have read this standard and drawn following conclusions:

A. Standard BN-74/9197-01 does not contain:

• 1. Description of sample designs.
• 2. Parameters of current depending on various applications, as killing fish, barriers, electronarcosis.
• 3. Parameters of current depending on lenght of fish.
• 4. Program of environmental researches, controlling size of dangerous zone, and effects of electricity to another organisms (see below - B.5).

B. Standard BN-74/9197-01 does contain:

• 1. Maximal nominal power: for portable equipment - 5kVA, for pemanent design - without limits (p.3.2).
• 2. Maximal nominal voltage of energy source: 250V-500V depending on kind of current and equipment (p.3.3).
• 3. Maximal nominal output voltage 250V-1000V depending on kind of current and equipment (p.3.3).
• 4. Prohibition of using power network, both high and low voltage as electric energy source.
• 5. Definition of zone with danger of electric shock as area not bigger, than in distance of 15m from electrodes creating electric field in water (p.1.3.15). (see above - A.4.)
• 6. Program of electric installation control from labour security point of view.
• 7. Program of mechanical control, it means stability and impact resistance.

Barbara Glowacka jastra@ jastra.com.pl

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