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224 10 NOMFS AND CAMPS IN FORF.Sr AREAR under fire expx►sure, tiontombustible type of finish matetials (e.g.. metal lath and plaster, gypsuin board and torment asbestos board. etc.) are satisfactory for in- terior finish. Plvwoods which delaminate• under heat or moisture are undesirable. l►lywtx►ds with component plies glued with phenolic resins are recommended- A-3-5 Clean gutters and the roof of needles and leaf ac cumulations. A-9-6.1.4 The "mesh" of woven wire is the numhvi of openings in 1 in. (2.54 cm) measured from the center of A wire to a point I in. (2.54 cm) distant. The mesh of ex. panded metal is the smaller of two dimensions of the dia- mond shaped openings. A44.1 Electrical installation for dwdlings should be inspected and approved by an authority having jurisdic- tion. such as an electrical inspector. tor. Here are some things to check to assure that electrical installations are completed properly. (a) Make certain that fuses or circuit breakers of the correct capacity are used for the electrical circuits. If the fuse or circuit breaker is of the incorrect capacity, then electrical overload of the circuit may cause overheating of the wiring and breakdown of the insulation. with fire resulting. (b) All wiring should be fastened securely to recep tacles and fixtures. Frayed or loosely connected wiring can result in arcing and shock hazards. (e) Fuse and circuit breaker panelboards should be located in a dry area so that the danger from moisture will be minimised. All metal enclosures and other noncurrent -carrying metal parts should be effectively grounded. (d) Modern approved cables with a grounding wire or metallic enclosure properh grounded during installation should be used Only grounding type outlets should be installed on such circuits Figure A4-I.leal Don't do this' Make sure there are enough rlet most oudeu to sear all appliances wit►out overloading. (r) Since .i grea deal of the older type electrical cir- cuits without a grounding wtiv air still in use, particular attention wkusC be given to other nte•thods of properly grounding :r:Nt�-rn electrical appliant ors on such t ircuits. such as by clanz:aing a grounding wire to) a metal g►ound• ed cold water ; oc•. (f) Service c eosps between tht service pole and the weather -head are a ,oarce of fire ignition and installa. tions must be made cx refuliv to minimizt the danger. All Tices and connectit.rw- in the service' drop wire between e service pole (trat'isftw,nrr) and weather -head must be 'nade with proper c-orinue—irs. Generaily, this type of in- stallation is made by powe utility companies. (g) A drop cord or tarn ',ter is built to cam- safely only the current ciemaN4ori. y a lamp bulb anti will overheat when used for ap; (ia,. - -s drawing inure t urrent (h) Discard appliances .mai tn-) not bear the label of a recognized testing laborator. Inc label or listing should be for the entire appliance or .- ther assembly and not just for the cord alone. A4-1.4 Outdoor electrical rmeptacles are• •rotected against weather by weatherer-x,rf cove AV%ays be careful to have dry hands and to bt t.;ti;ding in a drV area when inserting or removing a connet %-,n from a li%e eirc. trical circuit. A4-1.5 Electrical circuits. tads and t►ptliances aw grounded to minimize shuck hazard -I hi particularly important when persons are using powei ,,As outdtx►rs and may be standing on wet grass, sail, •`her moist surface. Make certain that the tot)] or .;� �,rance is grounded properly or double insulated. (a) Xe•.c•r allow curtaim, dtaperies and sin. •!aI, iiam- mable or tombustible fabrics. plastics, or paper nxfucts t lose to electric lamp bulbs (b► Restrict extension curds to their proper use: Bch cords should not be run through walls, windows or chi*:'s or under carpets or he used for permanent wiring. (c) Replace frayed. worn or spliced or taped cords im- mediately. Repairing of curds Inds result in additional hatartlu 01 Disconnect all appliantes such as toasters, portable space heaters, coffee IN►ts or hair dryers and pressing irons when not in u,t•. (r) Extensions to px-rmanent wiring often create serious electrical fire hazards because of improper joints and splices and tht- use of lamp cord as extension material (f► When certain parts of electrical equipment or ap- pliances are found it) be wearing out. or about to break down, examine the enure appliance t aiefull% for other possible faults. A-4-3.1 In areas where lightning tic cuts frequently. in- stall lightning arrrstcrs for the main electrical service. Dwellings and cottages expt►sed in oprn areas where thunderstorm acci.ity is frequent should be protected by a properly installed and maintained lightning n►d system in accordance with NFPA 78. Lightning farotectiun Code. Section 21. A-S-I.1 Underwriter% Laboratories. Inc_ Chicago. II linots, publishes luting+ of patented a hirntteys