ENGINEERING INSTRUCTIONS
An explanation


P.O. ENGINEERING DEPT
ENGINEERING INSTRUCTIONS
GENERAL
GENERAL
A 0001
Issue 10, 24.1.67

ENGINEERING INSTRUCTIONS
General Description

1. Engineering Instructions (E.I.s) are the main working instructions for P.O. staff employed on engineering and associated work. They are in loose­leaf form.

2. Responsibility for action on receipt of E.I.s.
Individual E.I.s may call for action by more than one duty in an office and a suggested method of assigning responsibility for action is contained in Respon­sibilities, A 0051.

3. E.I.s marked ‘FOR IMMEDIATE ATTENTION’
These must be read on receipt and any action indicated must be taken without delay. The marking will normally be deleted from subsequent issues.

4. Associated Instructions.

  • Principles of distribution - A 0010
  • Local filing and maintenance of files - A 0011
  • Binders and covers - A 0012
  • Setting-up, amendment and cancellation of files - A 0013
  • Functions of Distribution Centres - A 0014
  • List of Basic Duties - A 0018
  • Issue of local E.I.s - Regions and Eng. Dept. Branches - A 0024

5. Designation
The identity of an E.I. (its ‘Designation’) is given by its:-

DIVISION
Sub-division
Section letter
Number

These details are printed in the top right-hand corner of each page in particular type faces as for example:
GENERAL, GENERAL, A 0001, as on this Instruction.

6. Divisions:

GENERAL
ACCOMMODATION
ACCOUNTS & STATISTICS
INTERNAL WIRING
LINES
MISCELLANEOUS
POWER
PROTECTION
RADIO
STAFF
STORES
TELEGRAPHS
TELEPHONES
TESTS & INSPECTIONS
TOOLS & TRANSPORT
TRANSMISSION
WAYLEAVES
WORKS
 

7. Sub-divisions
Each Division contains a number of Sub-divisions. Apart from ‘Indexes’, the first sub­division is always ‘General’, the others naturally depend on the subject of the Division. The Sub­divisions (and their Sections) of each Division are shown in Instruction A 0000 in the ‘General’ Sub­division in that Division.

8.8. Sections
Each Sub-division contains a maximum of 26 Sections (lettered A-Z). The first (Section A 0018 A) is always ‘General’; the last (Section Z) is ‘Miscellaneous’; the others are used for various subjects as appropriate.

9.    9. Numbers
Every E.I. has a four-figure number. In those Divisions (usually on technical subjects) in which the scheme is appropriate the significance of the numbering is as follows:-

0000-0999 Instructions applying generally to the subject of the Section

1000-1999 Instructions describing plant items or theory

2000-2999 Instructions describing future or incomplete developments

3000-3999 Instructions describing installation or provision of plant

4000-4999 Instructions describing operation of plant

5000-5999 Instructions describing maintenance of plant

6000-6999 Instructions describing the keeping of records

7000-7999 Spare series

8000-8999 Spare series

9000-9999 Instructions issued locally or of restricted application. The source of issue of such an Instruction is shown by a code following the number:

e.g. H 9016 (Mid), B 9035 (Tpm).

An Instruction applying to more than one ‘thousands’ group is given a number in either the ‘0000’ or the ‘1000’ group.

10. ‘General’
Under the designation ‘General’ are normally placed those E.I.s which relate to more than one of the subjects of the Divisions, Sub­divisions or Sections as the case may be, e.g. E.I.s in TOOLS & TRANSPORT, General will refer to matters affecting more than one of the Sub-divisions Hand Tools, Mechanical Aids, or Vehicles.

11. ‘Miscellaneous’
The term ‘Miscellaneous’ is normally used to cover relatively minor items which, although they have a separate and well defined identity, are not ‘General’, e.g. the Division MISCELLANEOUS covers Fire Alarms and Time Services. The Sections Z serve a similar purpose within the smaller fields of the Sub-divisions.

The number A 0001 in each Sub-division is reserved for a brief statement, when necessary, of the scope of the Sub-division, while the 0001 sheet in each Section fulfils the same purpose for the Section.

13. Indexes

(a) Indexes, A 0001 is the general index for all E.I.s wherein items are broadly classified and indexed under the appropriate Sub-division(s) and Section letter.

(b) Sub-divisional. The number A 0002 in each Sub-division is reserved for a detailed index to Instructions in the Sub-division.

(c) Work-load indexes listed in Indexes, A series. These index the E.I.s which concern a particular duty or work-load. They are not suitable for checking particular files.

14. Legends
Each Instruction carries one of the following legends:

  • Crown Copyright Reserved
  • For Official Use Only
  • Restricted to P.O. Staff

An Instruction which carries the legend ‘For Official Use Only’ should not normally be shown to anyone who is not an official of a Government Dept. of the Commonwealth (see par. 15).

Instructions bearing the legend ‘Restricted to P.O. Staff’ should not be shown to anyone who is not an officer of the P.O.

15. Availability of Instructions
Within the P.O., Instructions are made available as appropriate by standardized methods of distribution (see A 0010).

To the general public only those Instructions which are marked ‘Crown Copyright Reserved’ are avail­able, and applicants should be referred to H.M. Stationery Office, 49 High Holborn, W.C. 1.

Applications from Government Depts., Overseas Administrations, P.O. contractors, etc. should be referred to the Eng. Dept. (E2/5).

16. References
When reference is made in the text to another Instruction in the same Sub-division, only the Section letter and number are quoted, e.g. (see A 0002).

17. When reference is made to an Instruction in another Sub-division of the same Division, the Sub­division, Section and number are quoted, e.g. (see Organization, B 1234).

19. A list of the references in an Instruction is given at the end of the Instruction for editorial purposes; they have no particular significance for the general reader whose attention is drawn to any requisite reference by direct mention in the text.

20. The code letters, etc. shown in brackets below the word ‘References’ at the end of an Instruction indicate the Branch or Section of the Eng. Dept. responsible for the Instruction.

21. Colours
Green paper indicates that an E.I. is temporary and will be cancelled, or reissued later as a permanent Instruction. All ‘point-page’ amendments are issued on green paper. E.I.s on pink and blue coloured paper introduced at the inception of the loose-leaf scheme have no significance now and their use for new or amended E.I.s has been abandoned.

22. Amendments
When only part of an E.I. needs alteration, the page concerned is reissued and its issue number is advanced by one. When a complete E.I. is reissued, the issue number on all pages is made one higher than the previous highest on any page. In any reissued page or complete Instruction, each paragraph or other item which has been changed since the previous issue is indicated by a star, placed against the number of the paragraph or item.

23. It is sometimes necessary to insert one or more paragraphs in an existing E.I. without reissuing the whole Instruction. In such cases decimal numbering is used, e.g. if a new paragraph between pars. 15 and 16 is required, it will be numbered 15.1. Similarly, if the increase in material necessitates a new page between pages 2 and 3 of a large Instruction the new page will be numbered 2.1.

Divisions and Sub-Divisions

DIVISION Sub-Division   DIVISION Sub-Division
GENERAL Indexes   STAFF General
  General     Establishment
  Organisation     Discipline
  Responsibilities     Leave
  Component Guides     Sickness
  Economics     Training
  Material Guides      
      STORES General
ACCOMMODATION General     Workman's Procedure
  Sites & Buildings     Storekeepers Procedure
  Plant Layout     Office Procedure
 

Furniture & Fittings

     
      TELEGRAPHS General

ACCOUNTS & STATISTICS

General     Multichannel V.F.
  Cash & Stores     P.W.S. and Telex
 

Cost Statement

    Teleprinter
  Control Statistics     Automatic Switching
         
INTERNAL WIRING General   TELEPHONES General
 

Exchanges

    Automatic
  Stations     Manual
        Trunks and Junctions
LINES General     P.B.X.s
  Underground     Call Offices
  Overhead     Stations
  Submarine     Traffic
 

Utilization

     
      TESTS & INSPECTIONS General
MISCELLANEOUS General     Acceptance Tests
  Fire Alarms     Lines
  Pneumatic Tubes     Routine
  Office & Postal Services     Telephone
 

Time

     
      TOOLS & TRANSPORT General
POWER General     Hand Tools
  Machines & Switchboards     Mechanical Aids
 

Cells

    Vehicles
  Heating      
  Lighting   TRANSMISSION General
  Ventilation     Telephone
        Carrier
PROTECTION General      
  Power   WAYLEAVES General
  Corrosion     Public
        Private
RADIO

General

    Railways and Canals
  Interference     Attachments
 

Systems

     
 

External Plant

  WORKS General
        Estimates and Allocations
        Execution of Works
        Repayment Works
 
 
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Last revised: December 18, 2010

FM