. Electrical news and engineering. ctrode welding only, having a capacity of fromSO to 170 amperes. With this outfit one metal electrode holderand one shield are supplied. For a wider range of work aType F panel should be used. This will handle metal elec-trode work from 80 to 160 amperes, and light .graphite elec-trode work up to .SOO amperes. The outfit includes one metalelectrode liolder, one graphite electrode Iiolder. and onemask. In installing an electric welding system using these port-able panels, the best method is to place a Westinghouse arcwelding motor generator set at some central
. Electrical news and engineering. ctrode welding only, having a capacity of fromSO to 170 amperes. With this outfit one metal electrode holderand one shield are supplied. For a wider range of work aType F panel should be used. This will handle metal elec-trode work from 80 to 160 amperes, and light .graphite elec-trode work up to .SOO amperes. The outfit includes one metalelectrode liolder, one graphite electrode Iiolder. and onemask. In installing an electric welding system using these port-able panels, the best method is to place a Westinghouse arcwelding motor generator set at some central point. Wheresuitable low resistance ground connection can readily bemade throughout the shop, as, for instance, where metal floorsor cast-iron liedplates are in general use or in a railway shopwhere the track system can be used, only one connector needbe extended to the various receptacles. The iron floor platesmay be arc-welded to each other and isolated sections tiedtogether by an iron rod or heavy copper cable, while the track. rails may be bonded by arc-welding the fish-plates to therails. Receptacles should then be provided at suitable pointsthroughout the shop of a capacity appropriate for the servicefor which they are intended. These rceptacles may readily bemounted out of doors if they are provided with protectionfrom the weather. Only single-pole receptacles and a singlewire cable to the portable panel need be provided. This cableshould be of sufficient length so that the panel may be placedas near as possible to the work in order to save steps andvaluable time for the welding operator. The flexible cableleading from the panel to the electrode holder should be asshort as is consistent to the class of work to be done. Where metal floors or tracks are not available, the ordin-ary two-wire system of distribution, with double-pole outletsand two-wire cables, should be provided. Ill THE TRirAT. NEWS Frl}|-unrv I, ^ To Patch Japan-Finished Surfaces When tin- blac
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